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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 36

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 36
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 36
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 13° =
  2. Complement of 44° =
  3. Complement of 79° =
  4. Complement of 84° =
  5. Complement of 12° =
  6. Complement of 55° =
  7. Complement of 27° =
  8. Complement of 18° =
  9. Complement of 42° =
  10. Complement of 49° =
  11. Complement of 16° =
  12. Complement of 23° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 36
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 61° =
  2. Supplement of 122° =
  3. Supplement of 35° =
  4. Supplement of 41° =
  5. Supplement of 34° =
  6. Supplement of 145° =
  7. Supplement of 131° =
  8. Supplement of 49° =
  9. Supplement of 36° =
  10. Supplement of 37° =
  11. Supplement of 94° =
  12. Supplement of 76° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 36
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 29° and 104°. Find the third angle.
  2. A triangle has angles 21° and 80°. Find the third angle.
  3. A triangle has angles 74° and 21°. Find the third angle.
  4. A triangle has angles 52° and 57°. Find the third angle.
  5. A triangle has angles 72° and 58°. Find the third angle.
  6. A triangle has angles 87° and 31°. Find the third angle.
  7. A triangle has angles 39° and 80°. Find the third angle.
  8. A triangle has angles 31° and 78°. 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.