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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 86

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 86
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 86
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 73° =
  2. Complement of 23° =
  3. Complement of 18° =
  4. Complement of 15° =
  5. Complement of 82° =
  6. Complement of 56° =
  7. Complement of 43° =
  8. Complement of 66° =
  9. Complement of 41° =
  10. Complement of 47° =
  11. Complement of 52° =
  12. Complement of 65° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 86
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 18° =
  2. Supplement of 107° =
  3. Supplement of 143° =
  4. Supplement of 155° =
  5. Supplement of 137° =
  6. Supplement of 40° =
  7. Supplement of 119° =
  8. Supplement of 122° =
  9. Supplement of 30° =
  10. Supplement of 85° =
  11. Supplement of 44° =
  12. Supplement of 76° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 86
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 91° and 25°. Find the third angle.
  2. A triangle has angles 25° and 104°. Find the third angle.
  3. A triangle has angles 27° and 95°. Find the third angle.
  4. A triangle has angles 92° and 26°. Find the third angle.
  5. A triangle has angles 39° and 34°. Find the third angle.
  6. A triangle has angles 43° and 39°. Find the third angle.
  7. A triangle has angles 97° and 41°. Find the third angle.
  8. A triangle has angles 33° and 117°. 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.