Ch. 1, 2, 3, 10 Flashcards

1
Q

Chapter 3

How do you find the angles of a regular polygon?

A

1) Take the sum of the interior angles
2) Divide by the number of sides

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2
Q

Chapter 3

A = 65
B = 95
C = 20

D = 65
E = 95
F = ?

If AB is equal to DF, what is the angle of F?

A

20 degrees

When two angles in one triangle are congruent to two angles in another triangle, the third angle is also congruent.

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3
Q

Chapter 3

Two figures are similar figures when one can be _________ by the other by a ____________ ________________.

A

Obtained

Similarity transformation

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4
Q

Chapter 2

What is an enlargement?

What is a reduction?

A

Enlargement: Multiply a scale factor greater than 1

Reduction: multiply a scale factor less than 1

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5
Q

Chapter 1

m + n = 3p

Solve for m.

A

m + n + 3p
-n -n
m = 3p - n

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6
Q

Chapter 1

What are the three ways an equation could have more than one answer?

A

One solution when x equals a value

Many solutions ( 1=1 )

No solutions which is a false statement ( 7=12 )

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7
Q

Chapter 10

If a sphere’s volume is 288, find the radius.

A

r = 4.2

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8
Q

Chapter 10

If a sphere’s radius is 4, find the volume

A

v = 267.9

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9
Q

Chapter 10

If a cone’s volume is 565.2 and its height is 15, find the radius.

A

r = 6

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10
Q

Chapter 10

If a cone’s volume is 565.2 and its radius is 6, find the height.

A

h = 15

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11
Q

Chapter 10

If a cone’s height is 15 and it’s radius is 6, find the volume.

A

v = 565.2

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12
Q

Chapter 10

If a cylinder’s volume is 28 and its height is 4, find the radius.

A

r = 1.5

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13
Q

Chapter 10

If a cylinder’s volume is 136 and its radius is 4, find the height.

A

h = 3.5

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14
Q

Chapter 10

If a cylinder’s radius is 5 and its height is 4, find the volume.

A

v = 314

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15
Q

Chapter 3

How do you find the interior angle measure of a polygon?

A

1) Find the sun of the interior angle measures
2) write and solve an equation using the information

s (sum) = ( n (sides) -2 ) 180

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16
Q

Chapter 3

When is a polygon convex or concave?

A

A polygon is convex when every line connecting any two vertices lines in the shape

A polygon is concave when at least one line segment connected any two vertices lies outside the polygon.

17
Q

Chapter 3

Find the angles of a:

Octagon
Decagon
18-gon

A

Octagon = 135
Decagon = 144
18-gon = 1440

(n-2)180

18
Q

Chapter 1

2x+5=10
Solve.

A

2x=5
x=2.5

19
Q

Chapter 1

2x-7=4x+2

A

-7=2x+2
-9=2x
x=–4.5