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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 39

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 39
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 39
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 64° =
  2. Complement of 19° =
  3. Complement of 45° =
  4. Complement of 41° =
  5. Complement of 30° =
  6. Complement of 60° =
  7. Complement of 69° =
  8. Complement of 58° =
  9. Complement of 76° =
  10. Complement of 24° =
  11. Complement of 78° =
  12. Complement of 63° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 39
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 57° =
  2. Supplement of 40° =
  3. Supplement of 62° =
  4. Supplement of 165° =
  5. Supplement of 50° =
  6. Supplement of 36° =
  7. Supplement of 153° =
  8. Supplement of 33° =
  9. Supplement of 32° =
  10. Supplement of 162° =
  11. Supplement of 25° =
  12. Supplement of 43° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 39
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 28° and 60°. Find the third angle.
  2. A triangle has angles 61° and 80°. Find the third angle.
  3. A triangle has angles 66° and 33°. Find the third angle.
  4. A triangle has angles 34° and 80°. Find the third angle.
  5. A triangle has angles 27° and 96°. Find the third angle.
  6. A triangle has angles 89° and 39°. Find the third angle.
  7. A triangle has angles 90° and 20°. Find the third angle.
  8. A triangle has angles 45° and 29°. 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.