Question

The original figure is dilated by a scale factor of 2.5. What is the perimeter of the new figure? 5 m 3 m 2 m 1m

Answer 1

50 meters

Explanation:

The perimeter is the sum of all the sides. IIn this case, what we must do is multiply by the scale factor by the original perimeter.

First we calculate the perimeter of the original figure:

`\begin{gathered} P=2+5+1+3+3+1+5 \\ P=20 \end{gathered}`

Now we multiply by the scale factor:

`\begin{gathered} P=2.5\cdot20 \\ P=50 \end{gathered}`

The perimeter of the new figure is 50 meters