Brian grilled a hamburger. The diameter of the hamburger was 5 cm. What was the area of burger?
Responses
A 15.7 cm²15.7 cm²
B 78.5 cm²78.5 cm²
C 19.625 cm²19.625 cm²
D 12.56 cm²
1 answer
The correct answer is C. The area of a circle is calculated using the formula A = πr², where r is the radius of the circle. In this case, the diameter of the hamburger is 5 cm, so the radius is half of that, which is 2.5 cm. Plugging this value into the formula, we get A = π(2.5)² = π(6.25) = 19.625 cm².
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