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# ​ Determine the scale factor (large to small) of the similar figures.

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1 Determine the scale factor (large to small) of the similar figures.

A) 1:2

B) 2:1

C) 3:1

D) 3:2

E) 5:3 Find the area of the circle, given the square has an area of 144 cm^2 (leave your answer in terms of π).

A) 12π cm^2

B) 24π cm^2

C) 36π cm^2

D) 72π cm^2

E) 144π cm^2

Nov 5, 2019

#1
+3

1. The length of the larger rectangle is 4, and the smaller one is 2. The width of the large rectangle is 2, and the smaller one is 1.

4/2 = 2/1 = 2

The scale factor of the similar figures is  2:1 (B)

2. The square has area of 144 cm^2, meaning that it has side length 12. This means that the diameter of the circle is 12, so the radius is 6

The formula for the area of a circle is πr^2.

Area = π36, or 36π cm^2 (E)

Nov 5, 2019

#1
+3

1. The length of the larger rectangle is 4, and the smaller one is 2. The width of the large rectangle is 2, and the smaller one is 1.

4/2 = 2/1 = 2

The scale factor of the similar figures is  2:1 (B)

2. The square has area of 144 cm^2, meaning that it has side length 12. This means that the diameter of the circle is 12, so the radius is 6

The formula for the area of a circle is πr^2.

Area = π36, or 36π cm^2 (E)

Oofrence Nov 5, 2019