Pupil Zone Maths

Missing angles (triangles and straight lines) worksheets for Class 5

Angles in a triangle add to 180°, and so do angles on a straight line.

  • Class 5, ages 10–11 (India)
  • Topic: Shapes and geometry
  • Easy, medium and hard levels, with fresh questions every time
  • Printable PDF with an answer key, or practise online with instant marking
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Sample questions

Class 5, medium level. Your worksheet will have new questions.

1.Two angles on a straight line are 85° and °. Find the missing angle. °
2.Two angles on a straight line are 115° and °. Find the missing angle. °
3.Two angles of a triangle are 40° and 95°. What is the third angle?
Answer °
4.Two angles of a triangle are 130° and 30°. What is the third angle?
Answer °
5.Two angles of a triangle are 70° and 40°. What is the third angle?
Answer °
6.Two angles of a triangle are 90° and 65°. What is the third angle?
Answer °
7.Two angles on a straight line are 135° and °. Find the missing angle. °
8.Two angles of a triangle are 20° and 80°. What is the third angle?
Answer °