Standard Mathematics Primary 5 Angles

Four angles meet at point O. Angle AOB = p°, angle BOC = 130°, angle COD = p° and angle DOA = 80°. Find the value of p.

A 50°
B 75°
C 80°
D 90°
Show Worked Solution

Worked Solution

Step 1: Angles at a point sum to 360°. Step 2: Write the equation: p + 130 + p + 80 = 360. Step 3: Collect like terms: 2p + 210 = 360. Step 4: Isolate 2p: 2p = 360 − 210 = 150. Step 5: Solve: p = 150 ÷ 2 = 75. Answer: 75°

Correct answer: 75°

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