In the figure below, . If and cm, find the length of .
In the following figure, polygon polygon . If and cm, find the length of .
The scale factor of similarity of one polygon with respect to another similar polygon is the ratio of the lengths of
corresponding sides. Since and are corresponding sides in polygons and , use substitution to help calculate , the
scale factor of similarity of with respect to .
Now use the fact that the ratio of the length of to the length of is equal to the scale factor to determine the length of .
Since , the length of is equal to cm.