Answer:
Step-by-step explanation:
Assumed Knowledge
Motivation
Content
Radii and chords
Angles in a semicircle
Angles at the centre and circumference
Cyclic quadrilaterals
The alternate segment theorem
Similarity and Circles
Links Forward
Converse of the circle theorems
Coordinate geometry
Calculus
History and Applications
The Euler line
The nine-point circle
Morley’s trisector theorem
Appendix − Converses to the Circle Theorems
Answers to Exercises
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ASSUMED KNOWLEDGE
Introductory plane geometry involving points and lines, parallel lines and transversals, angle sums of triangles and quadrilaterals, and general angle-chasing.
Experience with a logical argument in geometry written as a sequence of steps, each justified by a reason.
Ruler-and-compasses constructions.
The four standard congruence tests and their application to proving properties of and tests for special triangles and quadrilaterals.
The four standard similarity tests and their application.
Trigonometry with triangles.
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MOTIVATION
Most geometry so far has involved triangles and quadrilaterals, which are formed by intervals on lines, and we turn now to the geometry of circles. Lines and circles are the most elementary figures of geometry − a line is the locus of a point moving in a constant direction, and a circle is the locus of a point moving at a constant distance from some fixed point − and all our constructions are done by drawing lines with a straight edge and circles with compasses. Tangents are introduced in this module, and later tangents become the basis of differentiation in calculus.
The theorems of circle geometry are not intuitively obvious to the student, in fact most people are quite surprised by the results when they first see them. They clearly need to be proven carefully, and the cleverness of the methods of proof developed in earlier modules is clearly displayed in this module. The logic becomes more involved − division into cases is often required, and results from different parts of previous geometry modules are often brought together within the one proof. Students traditionally learn a greater respect and appreciation of the methods of mathematics from their study of this imaginative geometric material.
The theoretical importance of circles is reflected in the amazing number and variety of situations in science where circles are used to model physical phenomena. Circles are the first approximation to the orbits of planets and of their moons, to the movement of electrons in an atom, to the motion of a vehicle around a curve in the road, and to the shapes of cyclones and galaxies. Spheres and cylinders are the first approximation of the shape of planets and stars, of the trunks of trees, of an exploding fireball, and of a drop of water, and of manufactured objects such as wires, pipes, ball-bearings, balloons, pies and wheels.
a) The series of transformations to map Circle A onto Circle B is likely a translation. b) The series of transformations to map Circle C onto Circle A is a translation, rotation, and scaling.
a. To map Circle A onto Circle B, we must determine the transformation sequence. We can scale, rotate, and translate.
Translation: An object is translated horizontally or vertically without affecting shape or orientation. To match Circle B, Circle A appears to need to be shifted right and up.
Rotation: An object rotates around a fixed point. Rotation may not be needed since Circle A and Circle B appear to be aligned.
Scaling: An object is resized by scaling. Since Circle A and Circle B are the same size, scaling doesn't seem necessary.
Thus, Circle A-to-Circle B transformations are likely translations.
b. Again, we must determine the transformation sequence to transfer Circle C onto Circle A. Translation: Based on their relative positions, Circle C needs to be shifted left and down to match Circle A.
Rotation: To align Circles A and C, they must be rotated.
Scaling: Circle A is larger than Circle C, hence Circle C should be scaled down.
Thus, translating, rotating, and scaling map Circle C onto Circle A.
To know more about transformations
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i need help which slope.and y-intercept
Pleas help I’m giving a lot of points away
Answer:
interestinggggggggggggg
y is inversely proportional to x.
When y = 7, x= 9
Work out the value of y when x = 21.
Answer:
y = 3
Step-by-step explanation:
y is inversely proportional to x setup: y = k/x
'k' is the constant of variation; find this first
7 = k/9
k = 63
now use 'k' to find 'y'
y = 63/21
y = 3
х
Solve for x.
43°
22
everyday finn brushes his teeth 3 times , for 2 min each time , he flosses twice a day , for 5 minutes each time. In a year , how much time does finn spend brushing and flossing his teeth?
Answer:
5,840 minutes
Step-by-step explanation:
Assuming there are 365 days in a year. If finn brushes his teeth 3 times , for 2 min each time then the time spent to brush his teeth in a day
=3 * 2 minutes
= 6 minutes
If he flosses twice a day , for 5 minutes each time, then the time spent in a day to floss
= 2 * 5 minutes
= 10 minutes
Hence total time spent in a day brushing and flossing
= 6 + 10
= 16 minutes
Hence the time spent in a year brushing and flossing
= 16 * 365
= 5,840 minutes
Simplify:
75/5 x 9 - 9
Answer:
126?
Step-by-step explanation:
The value of x from the given equation is 3/5.
The given equation is 75/5 x=9.
What is an equation?In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
The given equation can be solved as follows:
75/5 x=9
⇒ 75x=45
⇒ x=45/75
⇒ x=3/5
Therefore, the value of x from the given equation is 3/5.
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4(x + 1) = 28
Multi step
Answer:
x = 6
Step-by-step explanation:
Pardon the bad handwriting
X (Select all that apply) <7and <8 are?
Vertical Angles
Supplementary Angles
Corresponding Angles
Alternate Interior Angles
Alternate Exterior Angles
✓Congruent
Answer:
Alternate interior angle yes
738 million in scientific notation
Answer:
738,000,000
Step-by-step explanation:millions you add 6 zeros. hope this helped
Answer:
= 7.38 × 108 I hope this helps
Step-by-step explanation:
On Saturday Tami petaled to the state park at 21 mi/hr. After lunch she rode back at 14 mi/hr. if her total riding time was 5 hours, how far was it to the park?
Could someone answer and explain question 10?
For the function f(x) = -4x^2 + 8x+8, find the slope of the tangent line at
X = -3.
Answer:
Find the corresponding y-value to x=−3.
Substitute −3 in for x.
y=−4(−3)²+8(−3)+8
Simplify −4(−3)²+8(−3)+8
y=−36−24+8 => y=−52
Find the first derivative and evaluate at x=−3 and y=−52 to find the slope of the tangent line.
Plug the slope and point values into the point-slope formula and solve for y
y=32x+44
Step-by-step explanation:
help I will mark brainliest for the person who answers them correct.
1. (bh)/2 or (4 x 3)/2 = 6
2. (8 x 12)/2 = 48
3. (11.25 x 15.6)/2 = 87.75
4. (9 x 10)/2 = 45
PLEASE HELP ME GUYS
Find the area of the shape below.
10 cm
27 cm
9 cm
24 cm
Answer:
396 cm²
Step-by-step explanation:
This may look complex, but it's actually an easy one.
The length of the left hand side is 27 cm, while the length of the right hand side is 9 cm. Subtracting 9 from 27, we have 18 cm
Also, the breadth of the bottom is 24 cm, while the breadth of the top is 10 cm. Subtracting 10 from 24, we have 14 cm.
Now, to find the area, we divide the diagram into 2. Taking the breadth first, we have breadth of 24 cm and it's relatively small height of 9 am.
Area of a rectangle is l * b, = 24 * 9 = 216 cm
Now, we look at the remaining part of the diagram. The length with a height of 18 cm, and a breadth of 10 cm. Area of a rectangle is l * b, = 180 cm
Adding both calculations together, we have 180 + 216 = 396 cm²
PLSS PLS PLS HELP ME I NEED THE ANSWER
question: solve for this solution using substitution.
Answer:point form= (-10,16)
Equation form : x=-10,y=16
Step-by-step explanation:
Answer:
point form (-10,16) equation Form: x=10,y=16
Step-by-step explanation:
The vertices of quadrilateral MNPQ are M(−3,−2),N(−1,4),P(2,4), and Q(4,−2). Translate quadrilateral MNPQ using the vector ⟨3,−4⟩.
Answer:
M'(0,-6),N'(2,0),P'(5,0) and Q'(7,-6)
Step-by-step explanation:
We are given that the vertices of quadrilateral MNPQ are M(-3,-2),N(-1,4),P(2,4) and Q(4,-2).
We have to translate the quadrilateral MNPQ using vector <3,-4>
The translate the coordinates of vertices (x,y) using the vector <a,b> is given by the rule
[tex](x,y)\rightarrow (x+a,y+b)[/tex]
Using the rule
The new coordinates of M
[tex](-3,-2)\rightarrow (-3+3,-4-2)[/tex]
[tex](-3,-2)\rightarrow (0,-6)[/tex]
The new coordinates of N
[tex](-1,4)\rightarrow (2,0)[/tex]
The new coordinates of P
[tex](2,4)\rightarrow (5,0)[/tex]
The new coordinates of Q
[tex](4,-2)\rightarrow (7,-6)[/tex]
Hence, after translation the new vertices of quadrilateral are
M'(0,-6),N'(2,0),P'(5,0) and Q'(7,-6)
4. A square pyramid has
measures 8 inches on each side. The height
of the pyramid is 11.5 inches. Determine the
volume of the pyramid.
volume:
Answer:
[tex]V = 245\frac{1}{3} in^{2}[/tex]
Step-by-step explanation:
The volume of a pyramid is equal to the area of the base times height divded by three so
[tex]V = \frac{A_{base} h }{3} \\V = \frac{(8^{2})(11.5) }{3} \\V = \frac{736}{3} \\V = 245\frac{1}{3} in^{2}[/tex]
Answer:
245 1/3
Step-by-step explanation:
expand and simplify (x+3)(x+5)
Which expression is equivalent to the given expression? Assume the denominator does not equal zero.
https://app.edmentum.com/mimetex/mimetex?\fs3%5Cfrac%7B14x%5E%7B4%7Dy%5E%7B6%7D%7D%7B7x%5E%7B8%7Dy%5E%7B2%7D%7D
ok so basically i got =2rx8y9
Given triangle ABC AB=BC=AC=a find the area of ABC
please help me its urgent!!
Answer:
Step-by-step explanation:
The correct answer is B. I'm pretty sure about it. Thank you.
what is the product of 2 4/7 × 13/12
Answer:
2 11/14
Step-by-step explanation:
First make both of them improper fractions.
therefore,
2 4/7 = 18/7
now simplify.
18/7 × 13/12
18 and 12 get cancelled off as they're multiples of 3 and 6
therefore,
3/7 × 13/2
3× 13 = 39
7×2 = 14
39/14
now make it a proper fraction
2 11/14//
I NEED HELP OMG PLSSSS
Answer:
m = 3
Step-by-step explanation:
-5m - 10 = -25
-5m = -15
m = 3
Answer:
[tex] - 5m - 10 = - 25 \\ - 5m = 10 - 25 \\ - 5m = - 15 \\ m = \frac{( - 15)}{ (- 5)} \\ \boxed{m = 3}✓[/tex]
★ m=3 is the right answer.what is
$1,000,000 x 1/3=
Answer:
333333.3
Step-by-step explanation:
The exact answer is
333333.333333
:)
(-5,-1); 2y=2x-4 help me ASAP please
(-5, -1) is not a solution to the equation 2y = 2x - 4.
What is a solution?Solutions are the values of an equation where the values are substituted in the variables of the equation and make the equality in the equation true.
We have,
2y = 2x - 4 _____(1)
Ordered pair: (-5, -1)
Now,
(-5, -1) = (x, y)
Substitute in (1)
2y = 2x - 4
2 x (-1) = 2 x (-5) - 4
-2 = -10 - 4
-2 = -14
This is not true.
Thus,
(-5, -1) is not a solution.
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Which angles are adjacent to each other?
a) Angle 12 and Angle 7
b) Angle 6 and Angle 9
c) Angle 12 and 9
d) Angle 5 and Angle 11
Answer:
(c). Angle 12 and 9
Step-by-step explanation:
Can anyone please help me with this with an explanation
Answer:
x=6
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
5x+4x−68=34−8x
5x+4x+ −68=34+ −8x
(5x+4x)+(−68)=−8x+34(Combine like terms)
9x+−68=−8x+34
9x−68=−8x+34
Step 2: Add 8x to both sides.
9x −68+ 8x= −8x +34 +8x
17x −68 =34
Step 3: Add 68 to both sides.
17x −68 +68= 34 +68
17x=102
Step 4: Divide both sides by 17.
17x /17= 102/17
X=6 > final answer hope i could help :)
Step-by-step explanation:
Let's step through this line by line, looking for a spot where the friend could have made a mistake.
[tex]5x+4x-68=34-8x\\5x+4x=102-8x\\5x+4x+8x=102\\17x=102\\x=6[/tex]
So, where could the friend have made their mistake? The key here is the transition from step 1 to step 2. What if we had subtracted 68 instead of adding it?
[tex]5x+4x-68=34-8x\\5x+4x=-34-8x\\5x+4x+8x=-34\\17x=-34\\x=-2[/tex]
There it is. The friend's problem was that they had accidentally subtracted 68 to both sides when they should have added it.
A movie theater sold 64 Hckets. of the tickets sold were adult tickets. How many adult tickets were sold?
Answer:
Adult tickets are $24 each and children tickets are $13 each.
Step-by-step explanation:
I know
What are the coordinates of the points after a 90 rotation about L? Counterclockwise
Answer:
The answer is L'(-2,2), M' (-6,4), and N' (-5,-4)
Step-by-step explanation:
Mapping Rule for 90 Counterclockwise Rotations
1) switch the x and y coords
2) multiply the new x coords by -1
3) Simplify
(x,y) --> (-y,x)
Example Problem
Rotate the point N(2,-4) 90 counterclockwise around the origin.
N(2,-4) --> N' (4,2)
I hope this helps you. I know the example problems always helped me understand.
3
of a number is 21.
5
Find the number