Member Avatar for david muchuku

how to compute the area of a circle

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  • Latest Post Latest Post by Sarkurd

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Member Avatar for NathanOliver

A=πr^2

Edited by NathanOliver
Member Avatar for ddanbe

The area of a circle is equal to the square of its radius, multiplied by pi. Pi being equal to 3.1415926.....

Edited by ddanbe because: correction
Member Avatar for Hiroshe

We know this equation works because (one way):

double integral {x^2 + y^2 <= r} 1 dxdy
= integral{0-2pi} integral{0-r} R dRdt
= integral{0-r} 2*pi*R dR
= pi*r^2

Edited by Hiroshe
Member Avatar for melissad

Take the radius r
Equation to find the area of the circle is (pi)rr

commented: Back to school for you. +0
Member Avatar for DistantGalaxy

Sarkurd, why not link directly to the search engine? Going via lmgtfy.com incurs a redirect, it's slow, and can you guarantee the link won't break? Sure it's possible that Google.com might vanish one day but it's much less likely.

Member Avatar for Sarkurd

DistantGalaxy i wanted teach him how to google it.

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