times~{3}~=~540^\circ\) The number of triangles in each polygon is two less than the number of sides. The formula for calculating the sum of interior angles is: \(({n}~-~{2})~\times~180^\circ ...

Polygons can be regular or irregular in shape. A polygon is a closed 2D shape with at least three sides. A regular polygon is a polygon with all equal sides and angles. An irregular polygon is a ...

Calculate the sum of interior angles in a pentagon. A pentagon contains 3 triangles. The sum of the interior angles is: All the interior angles in a regular polygon are equal. The formula for ...

The area of the rectangle is 12 cm 2. The area of a rectangle can also be calculated using the following formula. Calculate the area of the large rectangle. \(8 \times (4 + 4 + 4) = 8 \times 12 ...

Calculate the sum of interior angles in a pentagon. A pentagon contains 3 triangles. The sum of the interior angles is: All the interior angles in a regular polygon are equal. The formula for ...

The sum of the exterior angles of a polygon is 360°. Calculating the size of each exterior angle of regular polygons The formula for calculating the size of an exterior angle of a regular polygon ...