Knowing the difference between regular and irregular polygons can help when working out the size of missing angles. In order to work out the size of missing interior angles in polygons ...

Interior angle in a regular polygon = \(\mathbf{\frac{180(n-2)}{n}}\) If the side of a polygon is extended, the angle formed outside the polygon is the exterior angle. The sum of the exterior ...

If the angles are all equal and all the sides are equal length it is a regular polygon. To find the sum of interior angles in a polygon divide the polygon into triangles. The sum of interior ...

A polygon is simply a shape with three or more sides and angles. Quadrilaterals are 2D shapes with four sides and angles. There are six special quadrilaterals with different properties.

Before reading this guide, it may be helpful to read the guides from Module 1 on the properties of angles and the properties of 2D shapes. The sum of the angles inside any polygon can be found by ...

They can be described by the number of sides they have and whether the shape is regular or irregular. Where the straight sides of the polygon meet, an angle is created. Angles are measured in degrees ...