Question

​ Triangle A′B′C′ ​ is a dilation of ​ triangle ABC ​ .

What is the scale factor?

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Triangle ABC is shown. Side AB is labeled 9. Side BC is labeled 9. Side CA is labeled 18. Triangle A prime B prime C prime is shown. Side A prime B prime is labeled 4 and a half. Side B prime C prime is labeled 4 and a half. Side C prime A prime is labeled 9.

Answer 1

⅓

Explanation:

I took the test and ½ was wrong

Answer 2

1/2

Explanation:

The ratio of corresponding side lengths of the dilation are 1/2 those of the original, so the scale factor is 1/2.

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For example, A'C'/AC = 9/18 = 1/2.