Whats the area of a circle with a radius of 4?

1 Answer
Jul 5, 2018

Answer:

#16pi# or #~~50.24# units

Explanation:

The area of a circle is given by the expression

#pir^2# where #r# is the radius.

Since we know our radius, we can plug this into our expression to get

#pi*4^2=16pi# units

We can approximate this using #3.14# as #pi# to get

#3.14*16=50.24# units

Notice, #16pi# is an exact answer, but we can get an estimate of the area by using #3.14# as #pi# because sometimes it isn't intuitive to express area in terms of #pi#.

Hope this helps!