This key facts covers The Essential Angle Facts within Angle Facts for GCSE Mathematics. Revise Angle Facts in Geometry & Measures for GCSE Mathematics with 14 exam-style questions and 12 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 2 of 4 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 4
Practice
14 questions
Recall
12 flashcards
The Essential Angle Facts
| Angles on a straight line | Add up to 180° |
| Angles at a point | Add up to 360° |
| Vertically opposite angles | Are EQUAL |
| Right angle | Exactly 90° |
| Acute angle | Less than 90° |
| Obtuse angle | Between 90° and 180° |
| Reflex angle | Between 180° and 360° |