The ratio of the circumference to the diameter is defined as pi
pi=circumference/diameter
that is how they got pi
in this question it woul be 15.7/5 which would be 3.14,
c=2pir
a=pir^2
c=2pir=16pi
divide both sides by 2pi
r=8
a=pir^2
a=pi8^2
a=pi64
a=64pi in²
Its b because to simplify radical you multiply by in this instance sqrt of 5 on the denominator and numerator
24 divided by 21 is 1.14285714286. In fraction form it is 8/7, or 1 1/7.
Answer:
I am so sorry
Step-by-step explanation:
I dont really know what it is but I think it is 21.98 you do 7 times 3.14
Answer:
c
Step-by-step explanation: