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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 30

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 30
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 30
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 51° =
  2. Complement of 36° =
  3. Complement of 57° =
  4. Complement of 43° =
  5. Complement of 29° =
  6. Complement of 56° =
  7. Complement of 20° =
  8. Complement of 31° =
  9. Complement of 33° =
  10. Complement of 40° =
  11. Complement of 15° =
  12. Complement of 61° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 30
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 48° =
  2. Supplement of 137° =
  3. Supplement of 83° =
  4. Supplement of 54° =
  5. Supplement of 144° =
  6. Supplement of 72° =
  7. Supplement of 146° =
  8. Supplement of 136° =
  9. Supplement of 95° =
  10. Supplement of 28° =
  11. Supplement of 80° =
  12. Supplement of 33° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 30
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 90° and 58°. Find the third angle.
  2. A triangle has angles 31° and 33°. Find the third angle.
  3. A triangle has angles 90° and 21°. Find the third angle.
  4. A triangle has angles 98° and 37°. Find the third angle.
  5. A triangle has angles 63° and 82°. Find the third angle.
  6. A triangle has angles 30° and 120°. Find the third angle.
  7. A triangle has angles 55° and 25°. Find the third angle.
  8. A triangle has angles 79° and 65°. 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.