M8 Unit 2 Warm-Up for Review

When are two figures similar?

• Same Shape

• Same Size

• Proportional side lengths

• Same Angles

Answer explanation

Similar figures have the same shape, but they can have different sizes.

This means they have:

-corresponding congruent angles (same angles)

-proportional side lengths (same scale factor)

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Dilations change the size of a figure.

• True

• False

Answer explanation

Dilations make a figure bigger or smaller.

Tags

CCSS.8.G.A.3

Which of the following could be a scaled copy of a rectangle with sides 5 and 10?

• 5 and 6

• 10 and 15

• 15 and 30

• 10 and 25

Answer explanation

In order for it to be a scaled copy, each side length has to be multiplied by the same number. This number is the scale factor.

5x3=15

10x3=30

This is the only option where they are both multiplied by the same number.

Tags

CCSS.7.G.A.1

Slope is found by doing...

Tags

CCSS.8.EE.B.5

Find the slope of the line using slope triangles

• A

• B

• C

• D

Tags

CCSS.8.EE.B.5

Find the slope of the line using slope triangles

• A

• B

• C

• D

Tags

CCSS.8.EE.B.5

Find the slope of the line that passes through the points (2, 4) and (6, 12)

• 1/2
• -1/2
• 2
• -2

Tags

CCSS.8.EE.B.5

x is...

• horizontal (side to side)

• vertical (up and down)

y is...

• horizontal (side to side)

• vertical (up and down)

Tags

CCSS.5.G.A.1