Similarity and Scale Factor

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•

Mathematics

•

8th Grade

•

Hard

Joseph Anderson

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9 Slides • 8 Questions

Similar Figures, Dilations and Scale Factor

Review Week - Day 1

Multiple Select

Which shapes are similar?

(Click on the two you think are similar)

ABC

FED

IHG

Remember how we used to identify Similar Shapes.

BOTH CONDITIONS MUST APPLY.

Multiple Choice

The following triangles are Similar

TRUE

FALSE

Multiple Choice

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

Congruent

Vertical

Similar

Complementary

Moving To Dilations

Dilations happen When Similar Figures get enlarged or reduced

Multiple Select

choose the shapes that create a dilation.

(CHOOSE ALL THAT APPLY)

Figure 1

Figure 2

Figure 3

Figure 4

How do we get the Scale Factor?

Multiple Choice

Triangle ABC is dilated to produce triangle A'B'C' with scale factor 3/4 . Which describes the relationship between the two triangles?

Triangle A'B'C' is an enlargement of triangle ABC

Triangle A'B'C' is a reduction of triangle ABC

Triangle A'B'C' is a mirror image of triangle ABC

Multiple Choice

A dilation always produces a similar figure. Similar figures have the same ______ but different ______.

measure; shapes

sizes; shapes

value; measures

shape; sizes

Multiple Choice

The point (8, 12) was dilated to become point (2, 3). What was the scale factor?

Multiple Choice

Dilate the figure by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?
A(3,3) B(6,6) C(9,3)

A'(9,9) B'(18,18) C'(27,9)

A'(6,6) B'(9,9) C'(12,6)

A'(0,0) B'(3,3) C'(6,0)

A'(1,1) B'(2,2) C'(3,1)

Similar Figures, Dilations and Scale Factor

Review Week - Day 1

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