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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 55

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 55
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 55
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 34° =
  2. Complement of 31° =
  3. Complement of 12° =
  4. Complement of 63° =
  5. Complement of 26° =
  6. Complement of 25° =
  7. Complement of 22° =
  8. Complement of 7° =
  9. Complement of 73° =
  10. Complement of 8° =
  11. Complement of 54° =
  12. Complement of 65° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 55
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 91° =
  2. Supplement of 154° =
  3. Supplement of 29° =
  4. Supplement of 38° =
  5. Supplement of 81° =
  6. Supplement of 147° =
  7. Supplement of 106° =
  8. Supplement of 67° =
  9. Supplement of 73° =
  10. Supplement of 10° =
  11. Supplement of 150° =
  12. Supplement of 86° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 55
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 37° and 31°. Find the third angle.
  2. A triangle has angles 71° and 43°. Find the third angle.
  3. A triangle has angles 21° and 45°. Find the third angle.
  4. A triangle has angles 34° and 77°. Find the third angle.
  5. A triangle has angles 86° and 53°. Find the third angle.
  6. A triangle has angles 75° and 57°. Find the third angle.
  7. A triangle has angles 23° and 63°. Find the third angle.
  8. A triangle has angles 68° and 28°. 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.