GRADE 9 · MATHEMATICS · TOPIC 5

Lines and Angles

Vertically opposite angles are equal.

CONCEPT EXPLAINED

Understand the concept

Vertically opposite angles are equal.

SOLVED EXAMPLE

Vertical angle to 75°

  1. Step 1: Opposite angles at an intersection are equal.

Final answer: 75°

PRACTISE YOURSELF

Supplement of 120°

Show the answer

60°

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