Key Angle Properties

Part of Properties of Quadrilaterals · Section 3 of 10

Key FactsUnit: Geometry & MeasuresGCSE

Property	Applies to
All angles = 90°	Square, Rectangle
Opposite angles equal	Parallelogram, Rhombus, Rectangle, Square
Adjacent angles add to 180°	Parallelogram, Rhombus (co-interior angles)
One pair of opposite angles equal	Kite

This key facts covers Key Angle Properties within Properties of Quadrilaterals for GCSE Mathematics. Revise Properties of Quadrilaterals in Geometry & Measures for GCSE Mathematics with 11 exam-style questions and 3 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 3 of 10 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Practice questions for Properties of Quadrilaterals

Which of the following is a property of a parallelogram?

A. All four sides are equal
B. All four angles are 90°
C. Opposite sides are equal and parallel
D. Diagonals are equal in length

1 markfoundation

State THREE properties of a rhombus, at least one of which relates to its diagonals.

2 marksfoundation

Quick recall flashcards

Rhombus

All sides equal, opposite angles equal

Parallelogram

Opposite sides parallel and equal

The Quadrilateral Family

Worked Example 1: Missing Angle

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