Standard Mathematics Primary 5 Angles

Two straight lines PQ and RS cross at point O on a school field marker. The angle ∠POR is marked as 4x°, and the angle ∠QOS directly opposite it is marked 124°. Find the value of x.

A 14
B 31
C 62
D 124
Show Worked Solution

Worked Solution

Step 1: Identify the angle relationship. ∠POR and ∠QOS are formed by the same two lines crossing at O on opposite sides — they are VERTICALLY OPPOSITE angles. Step 2: Vertically opposite angles are equal. Therefore 4x° = 124°. Step 3: Divide both sides by 4: x = 124 ÷ 4. Step 4: Compute: 124 ÷ 4 = 31. Final answer: x = 31. Answer: 31

Correct answer: 31

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