Dilations and similarity

Scale a figure from a center by a factor and use similar figures to find missing lengths.

Standards:8.G.A.4G-SRT.A.2

Try it: three questions

Real questions from the practice bank. Tap an answer to check it.

Question 1 of 2

Triangle ABC is dilated by a scale factor of 3/2 to create triangle A'B'C'. If side AB = 8 cm, what is the length of side A'B'?

Question 2 of 2

Triangle ABC is dilated by a scale factor of 2.5 to create triangle A'B'C'. If side AB = 8 cm, what is the length of the corresponding side A'B'?

How this fits in

Dilations and similarity is one skill in the Coordinate Geometry unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

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