GRADE 4 · MATHEMATICS · TOPIC 8

Angles

A right angle is 90 degrees; obtuse angles are between 90 and 180.

CONCEPT EXPLAINED

Understand the concept

A right angle is 90 degrees; obtuse angles are between 90 and 180.

SOLVED EXAMPLE

Classify a 120° angle.

  1. Step 1: 120 > 90
  2. Step 2: 120 < 180.

Final answer: Obtuse

PRACTISE YOURSELF

Classify 65°.

Show the answer

Acute

Try another similar question and explain each step aloud. Refer to your school syllabus for topic level and notation.