Question

find the area of a circle if diameter = 42
PLEASE EXPLAIN ME STEP
BY STEP​

Answer 1

Answer:

1384.74

Step-by-step explanation:

3.14×21×21=1384.74

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Answer 2

Answer:

1386 unit ^2

Step-by-step explanation:

Area of circle = pi * r * r

Radius = Diameter / 2

Radius = 42/2

           = 21

Area of circle = 22/7 * 21 * 21

                      = 1386 unit ^ 2