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

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 4
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 4
Name:Date:Score:    / 12

Find the complement.

  1. Complement of 21° =
  2. Complement of 80° =
  3. Complement of 10° =
  4. Complement of 16° =
  5. Complement of 49° =
  6. Complement of 50° =
  7. Complement of 71° =
  8. Complement of 30° =
  9. Complement of 9° =
  10. Complement of 36° =
  11. Complement of 84° =
  12. Complement of 38° =

Supplementary angles

Class 6–7 · Worksheet 3 · set 4
Name:Date:Score:    / 12

Find the supplement.

  1. Supplement of 15° =
  2. Supplement of 18° =
  3. Supplement of 42° =
  4. Supplement of 55° =
  5. Supplement of 50° =
  6. Supplement of 168° =
  7. Supplement of 90° =
  8. Supplement of 130° =
  9. Supplement of 161° =
  10. Supplement of 76° =
  11. Supplement of 163° =
  12. Supplement of 144° =

Angles of a triangle

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

Find the third angle.

  1. A triangle has angles 96° and 29°. Find the third angle.
  2. A triangle has angles 33° and 83°. Find the third angle.
  3. A triangle has angles 33° and 73°. Find the third angle.
  4. A triangle has angles 65° and 36°. Find the third angle.
  5. A triangle has angles 100° and 47°. Find the third angle.
  6. A triangle has angles 65° and 28°. Find the third angle.
  7. A triangle has angles 45° and 25°. Find the third angle.
  8. A triangle has angles 70° and 50°. 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.