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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 72

Angles worksheets — types of angles and angle sums

Free angles worksheets for Class 4 to 7: name the type of angle (acute, right, obtuse, straight, reflex), complementary, supplementary and triangle angles — with answers.

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Types of angles (Class 4–5)Complementary angles (Class 6–7)Supplementary angles (Class 6–7)Angles of a triangle (Class 6–7)

Types of angles

Class 4–5 · Worksheet 1 · set 72
Name:Date:Score:    / 8

Name the type of the marked angle: acute, right, obtuse, straight or reflex.

  1. Type of angle?
  2. Type of angle?
  3. Type of angle?
  4. Type of angle?
  5. Type of angle?
  6. Type of angle?
  7. Type of angle?
  8. Type of angle?

Complementary angles

Class 6–7 · Worksheet 2 · set 72
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 37° =
  2. Complement of 48° =
  3. Complement of 77° =
  4. Complement of 27° =
  5. Complement of 75° =
  6. Complement of 36° =
  7. Complement of 70° =
  8. Complement of 11° =
  9. Complement of 49° =
  10. Complement of 19° =
  11. Complement of 15° =
  12. Complement of 56° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 72
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 130° =
  2. Supplement of 25° =
  3. Supplement of 73° =
  4. Supplement of 81° =
  5. Supplement of 48° =
  6. Supplement of 38° =
  7. Supplement of 101° =
  8. Supplement of 31° =
  9. Supplement of 95° =
  10. Supplement of 150° =
  11. Supplement of 18° =
  12. Supplement of 133° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 72
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 27° and 60°. Find the third angle.
  2. A triangle has angles 86° and 55°. Find the third angle.
  3. A triangle has angles 31° and 117°. Find the third angle.
  4. A triangle has angles 20° and 90°. Find the third angle.
  5. A triangle has angles 89° and 56°. Find the third angle.
  6. A triangle has angles 81° and 26°. Find the third angle.
  7. A triangle has angles 70° and 45°. Find the third angle.
  8. A triangle has angles 21° and 100°. Find the third angle.

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Questions

What are the 5 types of angles?

Acute (less than 90°), right (90°), obtuse (90°–180°), straight (180°) and reflex (180°–360°).

Are these worksheets free?

Yes — print them or save as PDF free. Every worksheet has an answer key.

How do I get different questions?

Press “🔄 New set” — the questions change (maths numbers are new every time; English sentences are shuffled).

How do I print only one worksheet?

Press “🖨️ Print” on that worksheet. Tick “with answer key” if you want the answers on a second page.

Can my child do this worksheet online, like a quiz?

Yes — press “▶️ Practise online” on any worksheet. The questions come one at a time with instant marking, a score at the end and a review of mistakes. No sign-in is needed.