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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 31

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 31
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 31
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 71° =
  2. Complement of 50° =
  3. Complement of 68° =
  4. Complement of 20° =
  5. Complement of 69° =
  6. Complement of 38° =
  7. Complement of 49° =
  8. Complement of 17° =
  9. Complement of 60° =
  10. Complement of 34° =
  11. Complement of 79° =
  12. Complement of 40° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 31
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 12° =
  2. Supplement of 44° =
  3. Supplement of 24° =
  4. Supplement of 132° =
  5. Supplement of 114° =
  6. Supplement of 68° =
  7. Supplement of 112° =
  8. Supplement of 106° =
  9. Supplement of 100° =
  10. Supplement of 51° =
  11. Supplement of 102° =
  12. Supplement of 48° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 31
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 23° and 30°. Find the third angle.
  2. A triangle has angles 25° and 51°. Find the third angle.
  3. A triangle has angles 77° and 33°. Find the third angle.
  4. A triangle has angles 39° and 68°. Find the third angle.
  5. A triangle has angles 73° and 33°. Find the third angle.
  6. A triangle has angles 41° and 30°. Find the third angle.
  7. A triangle has angles 36° and 88°. Find the third angle.
  8. A triangle has angles 68° and 75°. 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.