SOLUTION: The area of a sector of a circle is given by 1/2r^2 theta (theta in radians) so that an area element triangle A=1/2r^2Triangle theta. Use this to calculate the area of a semi-circl

Algebra ->  Surface-area -> SOLUTION: The area of a sector of a circle is given by 1/2r^2 theta (theta in radians) so that an area element triangle A=1/2r^2Triangle theta. Use this to calculate the area of a semi-circl      Log On


   



Question 1061199: The area of a sector of a circle is given by 1/2r^2 theta (theta in radians) so that an area element triangle A=1/2r^2Triangle theta. Use this to calculate the area of a semi-circle.
Answer by ikleyn(52798) About Me  (Show Source):
You can put this solution on YOUR website!
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The area of a sector of a circle is given by 1/2r^2 theta(theta in radians)so that an area element triangle A=1/2r^2 Triangle theta.
Use this to calculate the area of a semi-circle.
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The area of a semi-circle is %281%2F2%29%2Api%2Ar%5E2.     (*)


Independently of any hints.


Or, if you want to use that hint, use theta = pi in your formula to get the area of a semi-circle.
Surely, you will get the same as (*).