Question

Lori made a round cookie cake. the diameter of the cake is 8 cm. What is the area of the cake

Answer 1

The formula for working out the area of a circle is
`\pi`
`r^(2)`. r stands for the radius. The radius is the diameter divided by two.
r = d/2
r = 8cm/2
= 4cm
Now you just need to substitute r into the formula for the area of a circle:

`\pi`
`4^(2)`
=
`\pi`*16
= 16
`\pi`
`cm^(2)` (Remember that the area is always given in units squared, in this case cm)
≈ 50.3
`cm^(2)`