Angles
Angles measure turn. A full turn is 360°.
Turns and angle factsMeasuring and drawing anglesClassifying anglesConstructing trianglesAngle reasoning
📖 Learn
Types
Acute < 90°, Right = 90°, Obtuse 90°–180°, Reflex > 180°.
Straight line
Angles on a straight line add to 180°.
Triangle
Angles in a triangle add to 180°. Around a point: 360°.
Worked example
A triangle has angles 50° and 60°. Find the third.
- 1Angles in a triangle = 180°
- 250 + 60 = 110
- 3180 − 110 = 70° ✅
🧪 Play with it: Angle turner
60° Acute
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