The Area of an Arc Circle formula, A = ½• r²• (θ - sin(θ)), computes the area defined by A = f(r,θ) A = f(r,h) an arc and the chord connecting the ends of the arc (see blue area of diagram).
INSTRUCTIONS: Choose units and enter the following:
Area of an Arc Segment of a Circle (A): The calculator returns the area (A) in square meters. However the user can automatically convert the output units to numerous other compatible units via the pull-down menu.
If `theta` is unknown, the same area can be calculated if the depth (h) from the edge of the circle toward the center is known. (See figure) The following equation calculates the area using r and h: