Question

1. you can find the area of a polygon by dividing it into triangle and rectangle sub-parts and adding up their individual areas. which of the following is one of the rules of this method?

you must use one rectangle and two triangles.
the triangles must all be congruent.
you must be able to calculate the area of the triangle and rectangle sub-parts.
the polygon must be a regular polygon.

Explanation:

The method of finding a polygon's area by splitting it into triangles and rectangles relies on being able to calculate the area of each smaller sub-part, since the total area is the sum of these individual areas. The other options are incorrect: there's no fixed number of rectangles/triangles required, triangles don't need to be congruent, and the polygon doesn't have to be regular.

Answer:

You must be able to calculate the area of the triangle and rectangle sub-parts.