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

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
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
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 84° =
  2. Complement of 26° =
  3. Complement of 22° =
  4. Complement of 77° =
  5. Complement of 65° =
  6. Complement of 38° =
  7. Complement of 10° =
  8. Complement of 78° =
  9. Complement of 73° =
  10. Complement of 33° =
  11. Complement of 34° =
  12. Complement of 17° =

Supplementary angles

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

Find the supplement.

  1. Supplement of 72° =
  2. Supplement of 50° =
  3. Supplement of 139° =
  4. Supplement of 20° =
  5. Supplement of 51° =
  6. Supplement of 161° =
  7. Supplement of 145° =
  8. Supplement of 88° =
  9. Supplement of 16° =
  10. Supplement of 100° =
  11. Supplement of 157° =
  12. Supplement of 30° =

Angles of a triangle

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

Find the third angle.

  1. A triangle has angles 82° and 59°. Find the third angle.
  2. A triangle has angles 27° and 90°. Find the third angle.
  3. A triangle has angles 26° and 33°. Find the third angle.
  4. A triangle has angles 95° and 40°. Find the third angle.
  5. A triangle has angles 47° and 94°. Find the third angle.
  6. A triangle has angles 34° and 40°. Find the third angle.
  7. A triangle has angles 29° and 33°. Find the third angle.
  8. A triangle has angles 29° and 121°. 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.