Interior Angles of Polygons

Interior Angles of Polygons

Introduction

Polygons are closed shapes made of straight line segments. Triangles, quadrilaterals, pentagons, and hexagons are all polygons. Understanding interior angles helps us describe shapes, solve geometry problems, and de...

Nyra starts her math project by drawing a square.

She wonders how it connects to triangles, so she draws one diagonal between opposite corners, splitting the square into two triangles.

Knowing that every triangle’s angles sum to 180°, she calculates the square’s interior angle sum as 360°.

Next, she draws a pentagon with five s...