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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 21

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 21
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 21
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 67° =
  2. Complement of 36° =
  3. Complement of 10° =
  4. Complement of 58° =
  5. Complement of 85° =
  6. Complement of 25° =
  7. Complement of 74° =
  8. Complement of 39° =
  9. Complement of 81° =
  10. Complement of 52° =
  11. Complement of 57° =
  12. Complement of 82° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 21
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 72° =
  2. Supplement of 28° =
  3. Supplement of 133° =
  4. Supplement of 150° =
  5. Supplement of 12° =
  6. Supplement of 80° =
  7. Supplement of 132° =
  8. Supplement of 93° =
  9. Supplement of 48° =
  10. Supplement of 13° =
  11. Supplement of 136° =
  12. Supplement of 22° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 21
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 34° and 107°. Find the third angle.
  2. A triangle has angles 69° and 23°. Find the third angle.
  3. A triangle has angles 80° and 47°. Find the third angle.
  4. A triangle has angles 86° and 23°. Find the third angle.
  5. A triangle has angles 95° and 26°. Find the third angle.
  6. A triangle has angles 48° and 68°. Find the third angle.
  7. A triangle has angles 49° and 89°. Find the third angle.
  8. A triangle has angles 36° and 94°. 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.