# Ratio of the Areas of a Circular Segment and a Curvilinear Triangle

Ratio of the Areas of a Circular Segment and a Curvilinear Triangle

Two tangent lines are drawn from a point to the unit circle with center radius 1. The limit of the ratio between the blue area between the two tangent lines and the circle to the red area of the circular segment as the central angle approaches zero is 1/2. By moving the slider, you can see the changes in this ratio.

P(a,0)

(0,0)

B/A

B

A