When a circle's radius triples, what happens to its area?
A = πr^2
When r = 3r, then we have:
a = π(3r)^2
A = 9(πr^2)
This means Area increases by 9x
A = πr^2
When r = 3r, then we have:
a = π(3r)^2
A = 9(πr^2)
This means Area increases by 9x
Last edited: