2 concentric circles have radii 2cm and 3cm respectively, calculate the ratio of their areas
1 answer:
Answer:For the first circle the radius is 2cm and for the second circle the radius is 3cm,by taking the ratio of their areas:
πr^2:πR^2
π cancels out and we are left with only r^2:R^2
r=2cm and R=3cm
Therefore r^2:R^2=2^2:3^2
=4:9
The answer is 4:9
Step-by-step explanation:
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X^2-12+36=90
(x-6)^2=90
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