Named by size.
- 1
Acute
Less than 90°.
- 2
Right
Exactly 90° — look for the small square.
- 3
Obtuse
Between 90° and 180°.
- 4
Straight
Exactly 180°.
- 5
Reflex
Between 180° and 360°.
Topic 5 · Lessons
📐 Angles
Types of angles and angle sums.
Topic 5 · Lessons
Types of angles and angle sums.
Named by size.
Less than 90°.
Exactly 90° — look for the small square.
Between 90° and 180°.
Exactly 180°.
Between 180° and 360°.