Remember the interior and exterior angle add up to 180°. Question Calculate the size of the exterior and interior angle in a regular pentagon close pentagon A polygon with five sides. .

Learn about and revise angles, lines and multi-sided shapes and their properties with this BBC Bitesize GCSE Maths Eduqas study guide.

An exterior angle of a triangle is greater than either of its interior opposite angles. Students must go through the latest CBSE Syllabus for Class 9 Maths so that they can prepare according to ...