Scale Factor and Similar Figures Vocabulary

____ is the ratio of corresponding sides in similar figures.

• Scale Factor

• Composite Figure

• Similar Figures

• Pi

Tags

CCSS.7.G.A.1

____ is when two figures are the same shape and have proportional sides with congruent angles.

• Composite Figure

• Scale Factor

• Congruent

• Similar Figures

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Scale Factor

• the ratio of corresponding sides in similar figures; the multiplier used to create a dilation

• when we find the area of a figure

• when we determine that shapes are congruent

Tags

CCSS.8.G.A.3

Similarity

• when shapes have the same side lengths

• when two figures are the same shape and have proportional sides and congruent angles, but not always the same size

• when we plot on coordinate plane

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Shannon is making three different sizes of blankets from the same material. The first measures 2.5 feet by 2 feet. She wants to enlarge it by a scale factor of 2 to make the second blanket. Then she will enlarge the second one by a scale factor of 1.5 to make the third blanket. What are the dimensions of the third blanket?

• 2.5 feet by 2 feet

• 7.5 feet by 6 feet

• 7.5 by 6

• 5 feet by 4 feet

Tags

CCSS.7.G.A.1

Mathematical Equivalence

OFF

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

Are these figures similar? Why or why not?

• Yes, their shapes are the same

• No, their corresponding sides are not equal.

• No, their corresponding sides are not proportional.

• Yes, their corresponding sides are proportional

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Mathematical Equivalence

OFF

Tags

CCSS.7.G.A.1

Are the two figures similar?

• Yes

• No

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6