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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 88

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 88
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 88
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 78° =
  2. Complement of 71° =
  3. Complement of 24° =
  4. Complement of 77° =
  5. Complement of 29° =
  6. Complement of 19° =
  7. Complement of 12° =
  8. Complement of 9° =
  9. Complement of 41° =
  10. Complement of 55° =
  11. Complement of 56° =
  12. Complement of 44° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 88
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 143° =
  2. Supplement of 37° =
  3. Supplement of 35° =
  4. Supplement of 53° =
  5. Supplement of 82° =
  6. Supplement of 30° =
  7. Supplement of 145° =
  8. Supplement of 137° =
  9. Supplement of 106° =
  10. Supplement of 36° =
  11. Supplement of 148° =
  12. Supplement of 68° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 88
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 48° and 20°. Find the third angle.
  2. A triangle has angles 67° and 28°. Find the third angle.
  3. A triangle has angles 100° and 25°. Find the third angle.
  4. A triangle has angles 95° and 51°. Find the third angle.
  5. A triangle has angles 63° and 36°. Find the third angle.
  6. A triangle has angles 55° and 38°. Find the third angle.
  7. A triangle has angles 21° and 49°. Find the third angle.
  8. A triangle has angles 73° and 76°. 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.