Illustrative Mathematics - Geometry - Unit 3 - Lesson 9

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Last updated about 1 year ago

10 Questions

What is the length of segment DF?

G.CO.8

G.SRT.2

G.CO.10

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In triangle ABC, angle A is 35º and angle B is 20º. Select all triangles which are similar to triangle ABC.

triangle DEF where angle D is 35º and angle E is 20º

triangle GHI  where angle G is 35º and angle I is 30º

triangle JKL where angle J is 35º and angle L is 125º

triangle MNO where angle N is 20º and angle O is 125º

triangle PQR where angle Q is 20º and angle R is 30º

G.CO.8

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Decide whether triangles ABC and DEC are similar. Explain or show your reasoning.

G.CO.8

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G.CO.10

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Lin is trying to convince Andre that all circles are similar. Help her write a valid justification for why all circles are similar.

G.CO.8

G.SRT.2

G.CO.10

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Must these parallelograms be similar? Explain your reasoning.

G.CO.8

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Quadrilaterals Q and P are similar.

What is the scale factor of the dilation that takes P to Q?

\frac{3}{5}

\frac{4}{5}

\frac{5}{4}

\frac{5}{3}

G.CO.8

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10.

This lesson is from Illustrative Mathematics. Geometry, Unit 3, Lesson 9. Internet. Available from https://curriculum.illustrativemathematics.org/HS/teachers/2/3/9/index.html ; accessed 29/July/2021.

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