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Which of the following is the correct statement about angles formed by two intersecting straight lines?

easy MCQ 1 mark Class 5 · Mathematics · Shapes and Angles
  1. The sum of the four angles is 180°
  2. The sum of the opposite angles is 90°
  3. The sum of the four angles is 360°
  4. Each angle must be equal
Answer
The sum of the four angles is 360°

The correct answer is The sum of the four angles is 360° — Therefore the sum of the four angles = 360°.

Step-by-step solution

  1. Two intersecting straight lines divide the plane into four angles.
  2. Each pair of adjacent angles are supplements, but all four angles together make a complete circle.
  3. Total degrees in a circle = 360°.
  4. Therefore the sum of the four angles = 360°.
Common mistake: Confusing with supplementary angles (sum 180°) or thinking all four angles are equal

Concept tested: Sum of intersection angles

Published · How this solution was prepared and checked

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