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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 23

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 23
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 23
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 66° =
  2. Complement of 55° =
  3. Complement of 15° =
  4. Complement of 63° =
  5. Complement of 61° =
  6. Complement of 85° =
  7. Complement of 70° =
  8. Complement of 58° =
  9. Complement of 9° =
  10. Complement of 49° =
  11. Complement of 16° =
  12. Complement of 39° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 23
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 70° =
  2. Supplement of 15° =
  3. Supplement of 161° =
  4. Supplement of 134° =
  5. Supplement of 114° =
  6. Supplement of 113° =
  7. Supplement of 97° =
  8. Supplement of 87° =
  9. Supplement of 58° =
  10. Supplement of 145° =
  11. Supplement of 150° =
  12. Supplement of 148° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 23
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 28° and 76°. Find the third angle.
  2. A triangle has angles 86° and 60°. Find the third angle.
  3. A triangle has angles 60° and 42°. Find the third angle.
  4. A triangle has angles 91° and 24°. Find the third angle.
  5. A triangle has angles 20° and 45°. Find the third angle.
  6. A triangle has angles 45° and 84°. Find the third angle.
  7. A triangle has angles 88° and 48°. Find the third angle.
  8. A triangle has angles 68° and 49°. 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.