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Free · Class 4–7 · 4 worksheets · answer keys · practise online · set 16

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 16
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 16
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 19° =
  2. Complement of 82° =
  3. Complement of 10° =
  4. Complement of 23° =
  5. Complement of 43° =
  6. Complement of 15° =
  7. Complement of 51° =
  8. Complement of 83° =
  9. Complement of 13° =
  10. Complement of 33° =
  11. Complement of 79° =
  12. Complement of 29° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 16
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 91° =
  2. Supplement of 36° =
  3. Supplement of 35° =
  4. Supplement of 158° =
  5. Supplement of 139° =
  6. Supplement of 149° =
  7. Supplement of 137° =
  8. Supplement of 98° =
  9. Supplement of 18° =
  10. Supplement of 74° =
  11. Supplement of 151° =
  12. Supplement of 43° =

Angles of a triangle

Class 6–7 · Worksheet 4 · set 16
Name:Date:Score:    / 8

Find the third angle.

  1. A triangle has angles 66° and 36°. Find the third angle.
  2. A triangle has angles 40° and 87°. Find the third angle.
  3. A triangle has angles 100° and 27°. Find the third angle.
  4. A triangle has angles 100° and 23°. Find the third angle.
  5. A triangle has angles 83° and 54°. Find the third angle.
  6. A triangle has angles 54° and 60°. Find the third angle.
  7. A triangle has angles 44° and 69°. Find the third angle.
  8. A triangle has angles 32° and 40°. 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.