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Year 5 Maths — Angles and the protractor

Name an angle as acute, right, obtuse or straight, and measure one with a protractor.

Name: ________________________

  1. 1.Three angles are drawn below. Tap the obtuse one.

    Write the number of the part.

    123

  2. 2.How many degrees are there in a right angle?

  3. 3.An angle measures 45°. What kind of angle is it?

    • a) Straight
    • b) Acute
    • c) Right
    • d) Obtuse

  4. 4.How many right angles make a full turn?

  5. 5.An angle is measured with a protractor. One arm reads 20 and the other reads 75. How many degrees is the angle?

  6. 6.Put these angles in order, smallest first.

    • 25°
    • 90°
    • 170°
    • 70°
    • 135°

  7. 7.Match each angle to what it is called.

    • 40°
    • 90°
    • 120°
    • 180°
    • Straight
    • Right
    • Obtuse
    • Acute

  8. 8.How many degrees are there in a half turn?

Answer key — Year 5 Maths — Angles and the protractor

  1. 1. 3 — Angle C
  2. 2. 90
  3. 3. b) Acute
  4. 4. 4
  5. 5. 55
  6. 6. 1. 25° 2. 70° 3. 90° 4. 135° 5. 170°
  7. 7. 40° → Acute; 90° → Right; 120° → Obtuse; 180° → Straight
  8. 8. 180