IGCSE Maths / Working with shape and space

Angle sum of a quadrilateral

Edexcel International GCSE Maths (4MA1), chapter 11: Working with shape and space, specification point 4.2b. Part of the full course.

Read the revision notes · IGCSE Maths past papers

A quadrilateral is a closed shape with four straight sides. Its four interior angles add up to 360°, which lets you find a missing angle and give the correct reason.

More lessons in Working with shape and space

• Angles at a point and on a line
• Angles in parallel lines
• Angle sum of a triangle
• Exterior angle of a triangle
• Angles in special triangles
• Properties of quadrilaterals
• Writing geometrical reasons
• Angle sum of a polygon
• Interior and exterior angles of regular polygons
• Finding the number of sides from an angle
• Irregular polygon angle problems
• Perimeter and area of rectangles and triangles
• Area of a parallelogram
• Area of a trapezium
• Names of solids: faces, edges and vertices
• Surface area of a cuboid
• Surface area of a triangular prism
• Volume of a prism
• Compound prisms and volume units
• Time intervals, money and currency
• Converting units of length, area and volume