Question

The area of a circle, in terms of π , is 80 π m2. Find the value of the radius. Give your answer as a simplified surd.

Answer 1

Square's Area = w2 = 32 = 9 m2

Estimate of Circle's Area = 80% of Square's Area = 80% of 9 = 7.2 m2

Circle's True Area = (π/4) × D2 = (π/4) × 32 = 7.07 m2 (to 2 decimals)

Step-by-step explanation:

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