Illustrative Mathematics - Geometry - Unit 3 - Lesson 12

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Last updated about 1 year ago

8 Questions

Quadrilateral ABCD is similar to quadrilateral A'B'C'D'. Select all statements that must be true.

\frac{A'B'}{AB}=\frac{A'C'}{AC}

\frac{AD}{A'D'}=\frac{BC}{B'C'}

\frac{BD}{B'D'}=\frac{C'D'}{CD}

\frac{AB}{CD}=\frac{A'B'}{C'D'}

\frac{BC}{A'D'}=\frac{B'C'}{AD}

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Lines BC and DE are both vertical. What is the length of AD?

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Segment A'B' is parallel to segment AB. What is the length of segment BB'?

3.5

4

10

10.5

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Elena thinks length BC is 16.5 units. Lin thinks the length of BC is 17.1 units. Do you agree with either of them? Explain or show your reasoning.

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Mai thinks knowing the measures of 2 sides is enough to show triangle similarity. Do you agree? Explain or show your reasoning.

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Line g is dilated with a center of dilation at A. The image is line f. Approximate the scale factor.

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This lesson is from Illustrative Mathematics. Geometry, Unit 3, Lesson 12. Internet. Available from https://curriculum.illustrativemathematics.org/HS/teachers/2/3/12/index.html ; accessed 29/July/2021.

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