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.

Mathematics

1 answer:

galina1969 [7]3 years ago

6 0

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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