Perimeters and Areas of Similar Figures

How Do You Use Similar Figures to Find the Area of a Polygon?

When you're working with similar figures, knowing the scale factor can help you find all sorts of pieces including side measurements and area. This tutorial shows you how to use the scale factor to help find the area of one of the figures.
How Do You Find the Scale Factor Between Two Polygons if You Know Their Areas?

The scale factor between two similar polygons is not the same as the ratio of their areas. It's a bit more complicated than that! This tutorial will show you how to find the correct scale factor.