In the diagram above, the value of angles b + c is

Assessment: WAEC SSCE - General Mathematics - 1995 (Objective) Subject: General Mathematics

Question 1 Report

In the diagram above, the value of angles b + c is

Answer Details
Since angles b and c are alternate angles, they are equal. Therefore, b + c = 2b or 2c. But since a straight line forms a straight angle of 180 degrees, we have that angle a + angle b + angle c = 180 degrees. Solving for b + c, we get: b + c = 180 - a Therefore, the answer is (A) 180o.
Read lesson note on Angles And Intercepts On Parallel Lines (WAEC)
Read lesson note on Angles (WAEC)
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