What is the circumference of a round pizza with an area of 36 square inches?
2 answers:
Using the formulas
A=πr2
C=2πr
Solving forC
C=2πA
Your answer: 21.27
Knowing that your area is:
A= (pi) r^2 = 36 in^2
You can find the radius as:
r= (sqrt) 36/pi = 3.4 in
With this you can evaluate the circumference as:
C = 2(pi)r = 2 x 3.14 x 3.4 = 21.3 in
Answer: 21.3 in
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5) 18.8 cm
7) 49.5 ft
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