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Calculate the area of a circle with a radius of 2 cm and a circle with a radius of 4 cm. Leave your answers in terms of pi.

When the radius doubles, does the area of the circle double?
A) 4π cm2; 8π cm2; NO
B) 4π cm2; 16π cm2; NO
C) 4π cm2; 16π cm2; YES
D) 4π cm2; 8π cm2; YES

Calculate the area of a circle with a radius of 2 cm and a circle with a radius of 4 cm Leave your answers in terms of pi When the radius doubles does the area class=

Respuesta :

ulicat1
S = πr^2
so area of circle where r is 2cm;π=3,14 will be 
S = π*(2^2)
S=π*4
S=4π  cm2

S = πr^2
so circle  where r is 4cm;π=3,14 will be 
S = π*(4^2)
S=π*16
S=16π  cm2


the answer for second question is thet the area gets bigger 4 times if we double radius)so "yes"

ANSWER IS 
C) 4π cm2; 16π cm2; YES 

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