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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 41

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 41
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 41
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 31° =
  2. Complement of 69° =
  3. Complement of 84° =
  4. Complement of 66° =
  5. Complement of 7° =
  6. Complement of 14° =
  7. Complement of 18° =
  8. Complement of 78° =
  9. Complement of 43° =
  10. Complement of 82° =
  11. Complement of 72° =
  12. Complement of 19° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 41
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 139° =
  2. Supplement of 16° =
  3. Supplement of 160° =
  4. Supplement of 120° =
  5. Supplement of 36° =
  6. Supplement of 46° =
  7. Supplement of 162° =
  8. Supplement of 11° =
  9. Supplement of 21° =
  10. Supplement of 53° =
  11. Supplement of 146° =
  12. Supplement of 155° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 41
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 29° and 93°. Find the third angle.
  2. A triangle has angles 29° and 53°. Find the third angle.
  3. A triangle has angles 59° and 31°. Find the third angle.
  4. A triangle has angles 100° and 42°. Find the third angle.
  5. A triangle has angles 77° and 62°. Find the third angle.
  6. A triangle has angles 61° and 82°. Find the third angle.
  7. A triangle has angles 88° and 32°. Find the third angle.
  8. A triangle has angles 26° and 51°. 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.