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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 15

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 15
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 15
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 71° =
  2. Complement of 28° =
  3. Complement of 14° =
  4. Complement of 74° =
  5. Complement of 75° =
  6. Complement of 37° =
  7. Complement of 5° =
  8. Complement of 77° =
  9. Complement of 69° =
  10. Complement of 36° =
  11. Complement of 58° =
  12. Complement of 31° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 15
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 20° =
  2. Supplement of 71° =
  3. Supplement of 118° =
  4. Supplement of 37° =
  5. Supplement of 82° =
  6. Supplement of 53° =
  7. Supplement of 59° =
  8. Supplement of 58° =
  9. Supplement of 47° =
  10. Supplement of 161° =
  11. Supplement of 98° =
  12. Supplement of 23° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 15
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 73° and 36°. Find the third angle.
  2. A triangle has angles 20° and 64°. Find the third angle.
  3. A triangle has angles 90° and 42°. Find the third angle.
  4. A triangle has angles 62° and 86°. Find the third angle.
  5. A triangle has angles 28° and 23°. Find the third angle.
  6. A triangle has angles 22° and 84°. Find the third angle.
  7. A triangle has angles 83° and 44°. Find the third angle.
  8. A triangle has angles 88° and 49°. 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.