This key facts covers Types of Triangles within Properties of Triangles for GCSE Mathematics. 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 be a useful differentiator on mixed-topic papers. It is section 2 of 8 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 2 of 8
Practice
12 questions
Recall
3 flashcards
Types of Triangles
| Type | Sides | Angles | Key Feature |
|---|---|---|---|
| Equilateral | All 3 equal | All 60° | 3 lines of symmetry, rotational order 3 |
| Isosceles | 2 equal | 2 equal (base angles) | 1 line of symmetry |
| Scalene | All different | All different | No symmetry |
| Right-angled | Any combination | One 90° angle | Other two angles add to 90° |