Find the area and the circumference of a circle with radius 4 mm. Write your answers in terms of pi, and be sure to include the correct units in your answers.

Solution

Find the area and the circumference of a circle with radius 4 mm. Write your answers in terms of \pi, and be sure to include the correct units in your answers.

Solution

a re a : 16 π m m^{2}

c i rc u m f ere n ce : 8 π mm

Decimal Notation

50.26548 \dots, 25.13274 \dots

Solution steps

Circle Area given

r = 4 : A = 16 π

Circle circumference given

r = 4 : C = 8 π

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