What is the area of a semi circle with a 15 foot diameter?

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Answer 1 · 2018-04-04T00:56:43

The area of the semi-circle is #"88.357 ft"^2"#.

The formula for the area of a semi-circle is:

#A=(pir^2)/2#,

where:

#pi# is pi, and #r# is the radius.

The formula for the radius is:

#r="d"/2#,

where:

#d# is diameter.

First determine the radius.

#r=("15 ft")/2#

#r="7.5 ft"#

Now determine the area of the semi-circle.

#A=(pir^2)/2#

#A=((pi)*("7.5 ft")^2)/2#

I am going to use the #pi# button on my calculator. If your teacher has given you a value for #pi#, use that.

#A="88.357 ft"^2"# to three decimal places