Thread: Area of Circle with inscribed quadrilateral

Quadrilateral EFGH is inscribed in a circle. For positive real numbers, a, b, c, and d, let EF = √a, FG = √b, GH = √c, and HE = √d. If a + d = b + c, find the area of the circle.

Perhaps you at least can get started by studying this:
Cyclic Quadrilateral -- from Wolfram MathWorld

So because there are no actual number values I should only get my area in terms of a, b, c, and d?

Hi chris520,
If FH is a diameter then circle area is (a+d) * pi/4