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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 18

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 18
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 18
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 53° =
  2. Complement of 9° =
  3. Complement of 85° =
  4. Complement of 55° =
  5. Complement of 74° =
  6. Complement of 43° =
  7. Complement of 36° =
  8. Complement of 48° =
  9. Complement of 84° =
  10. Complement of 6° =
  11. Complement of 12° =
  12. Complement of 78° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 18
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 52° =
  2. Supplement of 78° =
  3. Supplement of 53° =
  4. Supplement of 130° =
  5. Supplement of 168° =
  6. Supplement of 45° =
  7. Supplement of 33° =
  8. Supplement of 121° =
  9. Supplement of 90° =
  10. Supplement of 137° =
  11. Supplement of 117° =
  12. Supplement of 153° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 18
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 92° and 23°. Find the third angle.
  2. A triangle has angles 36° and 70°. Find the third angle.
  3. A triangle has angles 98° and 20°. Find the third angle.
  4. A triangle has angles 79° and 49°. Find the third angle.
  5. A triangle has angles 60° and 86°. Find the third angle.
  6. A triangle has angles 69° and 33°. Find the third angle.
  7. A triangle has angles 53° and 42°. Find the third angle.
  8. A triangle has angles 95° and 22°. 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.