Area of the central circle triangle

Author:
mathman628
A central circle triangle is a triangle in a circle where the one of the points is the center of the circle it’s in. A=(n*(sqrt(4r^2-n^2)))/2 where n is the distance between the points of the triangle that are not the center of the circle and r is the radius of the circle.

What is the area when r=2 and n=5

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