What is the area of semi circle that has a radius of 2x?

(as a decimal)

or

(in terms of pi)

Step-by-step explanation:

To solve this we are using the formula for the area of a semi-circle:

where

is the area of the semi-circle

is the radius of the semi-circle

We know from our problem that our semi-circle has a radius of 2x, so . Let's replace that value in our formula to find :

We can conclude that the area of a semicircle that has a radius of 2x is (in terms or pi) or as a decimal: .

the image of (6, 9) under a dilation is (4, 6). the scale factor is

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