Angles
Acute, right, obtuse and straight angles.
Learn with Kutty
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An angle shows how much something turns.
Look: Small, square-corner and wide angles.
✏️ Your turn!
Type your answer and press Check. Kutty will tell you if it is right.
1Degrees in a half turn?
2Is 89° acute, right or obtuse?
3Angle of clock hands at 3 o’clock?
! Careful!
✗Longer lines make a bigger angle.
✓The angle is the turn, not the length.
✗Reading the wrong scale on a protractor.
✓Ask first: is this angle small or wide?
See the whole lesson on one page
An angle shows how much something turns.
A square corner is a right angle: 90°. Smaller is acute. Bigger (up to 180°) is obtuse. A straight line is 180°.
Think of it like thisOpen a door a little: small angle. Open it wide: big angle. A full spin all the way round is 360°.
- °
- Degrees: how we measure turning.
Solved together
At 4 o’clock, what is the angle between the clock hands?
A full turn is 360°. The clock has 12 spaces.
360 ÷ 12 = 30° per spaceFrom 12 to 4 is 4 spaces.
4 × 30° = 120°120° is more than 90°, so it is obtuse.
Answer120°, an obtuse angle.
Now practise it
Kanakku makes new questions on angles every time. It shows the working and gives a hint when you are stuck.