# Calculate area of segment of circle

## ( Equivalent to: surface area of segment of circle )

In next fields, kindly type the dimensions of your shape in the text box under title [ Unknowns: ]. After you type your value, click "CALCULATE" button; the answer will be automatically calculated and displayed in the text box under title [ Answer: ]. Also, you will be able to animate your shape through buttons under the below figure.

## How to Calculate Area Of Segment Of Circle

*Example: What is the area of segment of circle with radius = 21 units and angle = 108 units?*

As;

area of segment of circle = (angle*π/360-sin(angle)/2)*(radius)^{2}

By substituting the above given data in the previous function;

(i.e.) = (108*π/360-sin(108)/2)*(21)^{2}

Answer is: units^{2}.

*Practice Question: Calculate area of segment of circle for the following problems:*

N.B.: After working out the answer of each of the next questions, click adjacent button of see the correct answer.

( i ) radius = 9 units and angle = 111 units

( ii ) radius = 8 units and angle = 126 units

( iii ) radius = 5 units and angle = 114 units