Foundation Mathematics Primary 6 Circles

Ahmad cuts a circular pizza exactly in half. Each half is a semicircle with a radius of 7 cm. Find the area of one semicircle. (Take π = 22/7.)

A 77 cm²
B 154 cm²
C 38.5 cm²
D 36 cm²
Show Worked Solution

Worked Solution

Step 1: Find the area of the full circle first. Full area = π × r × r = 22/7 × 7 × 7 = 154 cm². Step 2: A semicircle is half of a circle. Divide the full area by 2. Semicircle area = 154 ÷ 2 = 77 cm². Final answer: 77 cm². Answer: 77 cm²

Correct answer: 77 cm²

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