In irregular quadrilaterals, each angle is a different size. To find a missing angle in an irregular quadrilateral: Add the known angles.

Check CBSE Class 9 Maths Chapter 8 Quadrilaterals Extra Questions and Answers for 2020-21. Prepare for your exams with the help of these important questions to score good marks.

Learn about angles in triangles and quadrilaterals with this BBC Bitesize Maths article. For students between the ages of 11 and 14. ... In irregular quadrilaterals, each angle is a different size.