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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 81

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 81
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 81
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 54° =
  2. Complement of 11° =
  3. Complement of 13° =
  4. Complement of 27° =
  5. Complement of 31° =
  6. Complement of 83° =
  7. Complement of 71° =
  8. Complement of 45° =
  9. Complement of 7° =
  10. Complement of 39° =
  11. Complement of 85° =
  12. Complement of 38° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 81
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 132° =
  2. Supplement of 98° =
  3. Supplement of 168° =
  4. Supplement of 67° =
  5. Supplement of 24° =
  6. Supplement of 155° =
  7. Supplement of 18° =
  8. Supplement of 167° =
  9. Supplement of 138° =
  10. Supplement of 101° =
  11. Supplement of 22° =
  12. Supplement of 145° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 81
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 34° and 71°. Find the third angle.
  2. A triangle has angles 64° and 29°. Find the third angle.
  3. A triangle has angles 91° and 35°. Find the third angle.
  4. A triangle has angles 54° and 66°. Find the third angle.
  5. A triangle has angles 82° and 24°. Find the third angle.
  6. A triangle has angles 37° and 52°. Find the third angle.
  7. A triangle has angles 72° and 29°. Find the third angle.
  8. A triangle has angles 23° and 62°. 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.