Advanced Mathematics Primary 6 Circles

A square of side 14 cm has a quarter circle of radius 14 cm cut from one corner. Find the area of the remaining shaded shape. (Take π = 22/7.)

A 42 cm²
B 154 cm²
C 196 cm²
D 350 cm²
Show Worked Solution

Worked Solution

Step 1: Identify the composite as: square area minus quarter circle area. Step 2: Area of square = 14 × 14 = 196 cm². Step 3: Area of quarter circle = ¼ × πr² = ¼ × 22/7 × 14² = ¼ × 22/7 × 196 = ¼ × 616 = 154 cm². Step 4: Remaining shaded area = 196 − 154 = 42 cm². Final: 42 cm². Answer: 42 cm²

Correct answer: 42 cm²

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