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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 83

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 83
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 83
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 81° =
  2. Complement of 53° =
  3. Complement of 49° =
  4. Complement of 77° =
  5. Complement of 19° =
  6. Complement of 72° =
  7. Complement of 55° =
  8. Complement of 57° =
  9. Complement of 32° =
  10. Complement of 5° =
  11. Complement of 43° =
  12. Complement of 79° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 83
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 144° =
  2. Supplement of 132° =
  3. Supplement of 118° =
  4. Supplement of 111° =
  5. Supplement of 49° =
  6. Supplement of 53° =
  7. Supplement of 121° =
  8. Supplement of 68° =
  9. Supplement of 142° =
  10. Supplement of 48° =
  11. Supplement of 137° =
  12. Supplement of 72° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 83
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 65° and 61°. Find the third angle.
  2. A triangle has angles 89° and 20°. Find the third angle.
  3. A triangle has angles 78° and 68°. Find the third angle.
  4. A triangle has angles 45° and 26°. Find the third angle.
  5. A triangle has angles 20° and 67°. Find the third angle.
  6. A triangle has angles 87° and 52°. Find the third angle.
  7. A triangle has angles 20° and 116°. Find the third angle.
  8. A triangle has angles 40° and 25°. 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.