alleryThe area of a quadrant of a circle of radius r is
A(pi × r squared)/2
B(pi × r squared)/4
Cpi × r squared
D2 × pi × r squared
Answer & Solution
Correct answer: B. (pi × r squared)/4
1. A quadrant is 90/360 = 1/4 of the full disk.
2. Full area = pi × r squared.
3. Quadrant area = (pi × r squared)/4.
_Source: syllabus Mathematics, Ch 11 "Areas Related to Circles", §11.2_
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