Ratio of Similar Shapes

The following shapes are similar, the smaller one is the original shape, what is the scale factor?

• 8:12

• 3:2

• 4:8

• 6:12

Tags

CCSS.7.G.A.1

Are the following similar? Why or why not?

• Yes

• No, the corresponding angles are not equal.

• No, the ratios of the corresponding sides are not equal.

Tags

CCSS.HSG.SRT.A.2

Sides in similar figures must be proportional.  

• True

• False 

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

What is a scale factor?

• Shapes that have the same shape, but not necessarily the same size.

• A ratio/number that compares the sizes of the parts of the scale drawings.

• They are sides that are in the same position in different plane figures.  

• The length of a side of a similar figure.

Tags

CCSS.7.G.A.1

Solve for X.

• 2 ft

• 3 ft

• 4 ft

• 6 ft

Tags

CCSS.HSG.SRT.A.2

Find the length of x

• x = 1

• x = 2

• x = 7

• x = 1/7

Tags

CCSS.HSG.SRT.A.2

All corresponding sides are proportional (same ratio) in similar figures.

• True

• False

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Find missing side

• 5

• 7

• 9

• 11

Tags

CCSS.HSG.SRT.A.2

The rectangles are similar.

Solve for x.

Mathematical Equivalence

ON

Tags

CCSS.HSG.SRT.A.2

Two objects that are the same shape but not the same size are _______.

• Congruent

• Vertical

• Similar

• Complementary 

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6