Question

You See

Diagonals divide a polygon into_
You Know
The sum of the interior angles of a triangle is
You Infer
I can multiply the number of
by
in a polygon
to find the sum of its interior angles,

Answer 1

See below in bold face.

Explanation:

You See

Diagonals divide a polygon into triangles .

You Know

The sum of the interior angles of a triangle is 180° .

You Infer

I can multiply the number of triangles in a polygon

by 180° to find the sum of its interior angles,