Question

Estimate the measure of this angle within 15 degree.

Answer 1

= 90°

How?

• The line AB is perpendicular on line CB.
• As we know that, The angle formed by perpendicular lines is equal to 90°.
• Therefore, The angle given is 90°

Answer 2

≈ 90°

Explanation:

From inspection of the diagram, it appears that the measure of the angle is a right angle (the two lines are perpendicular), so it is approximately 90°