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Geometry & MeasuresKey Facts

Key Angle Properties

Part of Properties of Quadrilaterals — GCSE Mathematics

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 9 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 3 of 9

Practice

11 questions

Recall

3 flashcards

Key Angle Properties

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

Keep building this topic

Read this section alongside the surrounding pages in Properties of Quadrilaterals. That gives you the full topic sequence instead of a single isolated revision point.

The Quadrilateral FamilyWorked Example 1: Missing AngleThe 360° FamilyWorked Example 2: Parallelogram Angles

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

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The Quadrilateral Family

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Worked Example 1: Missing Angle