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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 49

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 49
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 49
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 66° =
  2. Complement of 26° =
  3. Complement of 17° =
  4. Complement of 25° =
  5. Complement of 53° =
  6. Complement of 21° =
  7. Complement of 60° =
  8. Complement of 69° =
  9. Complement of 31° =
  10. Complement of 40° =
  11. Complement of 51° =
  12. Complement of 11° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 49
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 103° =
  2. Supplement of 123° =
  3. Supplement of 38° =
  4. Supplement of 154° =
  5. Supplement of 28° =
  6. Supplement of 114° =
  7. Supplement of 132° =
  8. Supplement of 59° =
  9. Supplement of 87° =
  10. Supplement of 93° =
  11. Supplement of 126° =
  12. Supplement of 108° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 49
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 54° and 55°. Find the third angle.
  2. A triangle has angles 45° and 76°. Find the third angle.
  3. A triangle has angles 56° and 54°. Find the third angle.
  4. A triangle has angles 39° and 51°. Find the third angle.
  5. A triangle has angles 78° and 52°. Find the third angle.
  6. A triangle has angles 68° and 73°. Find the third angle.
  7. A triangle has angles 23° and 113°. Find the third angle.
  8. A triangle has angles 51° and 37°. 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.