Geometry & MeasuresLow Exam FrequencyAQAEdexcelOCRWJEC

Properties of Triangles

Revise Properties of Triangles in Geometry & Measures for GCSE Mathematics with 12 exam-style questions and 3 flashcards. This topic appears less often, but it can still pick up marks when it appears in mixed-topic papers.

Study this topic

The 180° Rule

Introduction 2

Types of Triangles

Key Facts 3

Triangle Angle Rules

Key Facts 4

Worked Example 1: Finding a Missing Angle

Notes 5

Worked Example 2: Isosceles Triangle

Notes 6

Worked Example 3: Exterior Angle

Notes 7

Common Mistakes

Notes 8

Practice Questions

Notes

Sample Flashcards

Triangle Angle Sum

Always 180°

Isosceles Triangle

Two equal sides, two equal angles

Sample Questions

What is the sum of the interior angles of any triangle?

A. 90°
B. 180°
C. 270°
D. 360°

1 markfoundation

Describe the key properties of an equilateral triangle. State two properties relating to sides and two relating to angles.

2 marksstandard

exam-style questions

revision flashcards

Ready to revise Properties of Triangles?

Get personalised daily study plans, adaptive quizzes, and spaced repetition flashcards.

Join Alpha

Previous topic

Angles in Polygons

Next topic

Properties of Quadrilaterals