### Home > CCG > Chapter 9 > Lesson 9.1.1 > Problem9-8

9-8.

Assume that two figures on a flat surface, $A$ and $B$, are similar. Homework Help ✎

1. If the linear scale factor is $\frac { 2 } { 5 }$, then what is the ratio of the areas of $A$ and $B$?

$\text{ratio of areas = (linear scale factor)}^2$

$\frac {4}{25}$

2. If the ratio of the perimeters of $A$ and $B$ is $14:1$, what is the ratio of the areas?

Review Lesson 8.2.2 for further help.

3. If the area of $A$ is $81$ times that of $B$, what is the ratio of the perimeters?