Search over 10,000 free study notes

Rearange the equation to make r the subject of the formula. So we divide both sides by 2(pi)

Area of a cirlce = π x r^2

The radius (r) = the diameter / 2

So, r = 60/2 = 30

Therefore, the area of the ice rink = π x 30^2 = 900π

Surds are irrational numbers that can't be represented accurately as a fraction or reccuring decimal, so they are left as a square root. For example:  √  3 . Calculate the square root of 3 using your calc...