Question

The diameter of a circle is 5 ft. What is the area of the circle?

Answer 1

`19.6ft^2`

Explanation:

You need to know the formula for calculating the area of a circle:

`pir^2`

So if you know that the diameter is 5 ft, you can calculate the radius. The radius the measurement in a circle from the middle to an outer edge: this means that `r` = `d/2`

So therefore, `5/2=2.5ft`

Now we can calculate the area using the formula.

`2.5^2=6.25`

`6.25xxpi=19.634ft^2`

You could however round this to `19.6ft^2` depending on how many decimal places the question is asking for.

Real result = `19.6349540849`