Asked by Anonymous

If a circle has a 3cm radius,

1. By what factor does the circumference change if the radius is tripled?

C = 2pi * radius

Why is the answer correct?

2. By what factor does the area change if the radius is doubled? Explain.

Area = pi * (rad)^2

Why is the answer correct

Answers

Answered by Arora
I just answered a very similar question right above this one, give this question a go based on that and let us know which part you're finding tough to understand :)
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