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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 25

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 25
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 25
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 5° =
  2. Complement of 75° =
  3. Complement of 49° =
  4. Complement of 65° =
  5. Complement of 33° =
  6. Complement of 78° =
  7. Complement of 36° =
  8. Complement of 37° =
  9. Complement of 82° =
  10. Complement of 83° =
  11. Complement of 70° =
  12. Complement of 34° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 25
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 122° =
  2. Supplement of 18° =
  3. Supplement of 15° =
  4. Supplement of 118° =
  5. Supplement of 145° =
  6. Supplement of 68° =
  7. Supplement of 63° =
  8. Supplement of 113° =
  9. Supplement of 163° =
  10. Supplement of 31° =
  11. Supplement of 61° =
  12. Supplement of 133° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 25
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 30° and 87°. Find the third angle.
  2. A triangle has angles 88° and 31°. Find the third angle.
  3. A triangle has angles 60° and 30°. Find the third angle.
  4. A triangle has angles 58° and 43°. Find the third angle.
  5. A triangle has angles 84° and 31°. Find the third angle.
  6. A triangle has angles 27° and 30°. Find the third angle.
  7. A triangle has angles 64° and 50°. Find the third angle.
  8. A triangle has angles 20° and 58°. 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.