Question

the circumference of a circle exceed its diameter by 90cm .Find the area of the circle
@Werewolfprincess

Answer 1

eek math!

Answer 2

oooo math :}

Answer 3

circumference = pi * d where d = diameter
pi * d - d = 90

solve for d

radius r = d /2

area = pi r^2

Answer 4

?

Answer 5

first find the diameter of the circle by solving the equation
pi*d - d = 90
d( pi - 1) = 90

d = 90 / (pi - 1)

work this out on ur calculator
then divide by 2 to find the radius of the circle (r)

then find the area using the formula pi * r^2

Answer 6

we are not allowed to use a calci

Answer 7

ok - use 3.14 for pi
so diameter d = 90 / (3.14 - 1) = 90 / 2.14

Answer 8

you'll have to use long division to find d