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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 19

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 19
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 19
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 74° =
  2. Complement of 69° =
  3. Complement of 29° =
  4. Complement of 25° =
  5. Complement of 57° =
  6. Complement of 77° =
  7. Complement of 55° =
  8. Complement of 67° =
  9. Complement of 79° =
  10. Complement of 64° =
  11. Complement of 12° =
  12. Complement of 8° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 19
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 93° =
  2. Supplement of 146° =
  3. Supplement of 149° =
  4. Supplement of 39° =
  5. Supplement of 81° =
  6. Supplement of 18° =
  7. Supplement of 56° =
  8. Supplement of 80° =
  9. Supplement of 110° =
  10. Supplement of 11° =
  11. Supplement of 137° =
  12. Supplement of 51° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 19
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 63° and 49°. Find the third angle.
  2. A triangle has angles 56° and 60°. Find the third angle.
  3. A triangle has angles 46° and 78°. Find the third angle.
  4. A triangle has angles 57° and 26°. Find the third angle.
  5. A triangle has angles 42° and 81°. Find the third angle.
  6. A triangle has angles 77° and 33°. Find the third angle.
  7. A triangle has angles 33° and 86°. Find the third angle.
  8. A triangle has angles 100° and 45°. 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.