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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 79

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 79
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 79
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 36° =
  2. Complement of 49° =
  3. Complement of 15° =
  4. Complement of 38° =
  5. Complement of 14° =
  6. Complement of 25° =
  7. Complement of 18° =
  8. Complement of 40° =
  9. Complement of 23° =
  10. Complement of 26° =
  11. Complement of 20° =
  12. Complement of 55° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 79
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 112° =
  2. Supplement of 69° =
  3. Supplement of 31° =
  4. Supplement of 151° =
  5. Supplement of 143° =
  6. Supplement of 13° =
  7. Supplement of 12° =
  8. Supplement of 100° =
  9. Supplement of 79° =
  10. Supplement of 54° =
  11. Supplement of 76° =
  12. Supplement of 22° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 79
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 82° and 47°. Find the third angle.
  2. A triangle has angles 82° and 66°. Find the third angle.
  3. A triangle has angles 31° and 81°. Find the third angle.
  4. A triangle has angles 100° and 47°. Find the third angle.
  5. A triangle has angles 75° and 29°. Find the third angle.
  6. A triangle has angles 61° and 79°. Find the third angle.
  7. A triangle has angles 69° and 51°. Find the third angle.
  8. A triangle has angles 56° and 77°. 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.