Prop. 14 II Euclid Question

[DEMJR]

We are given that ABCD is a rectangle and AE is the diameter of the circle, and BFGH is a square. I want to figure out how to show that ABCD has the same area as BFGH. Where do I even begin? (see attached picture)

[lavinia]

We are given that ABCD is a rectangle and AE is the diameter of the circle, and BFGH is a square. I want to figure out how to show that ABCD has the same area as BFGH. Where do I even begin? (see attached picture)

The only thing you have to go on is the BE equals BC.

Note that if x = sin(a) then b = 1 - cos(a)

[coolul007]

prove that measure x equals the square root of a times b. complete the circle and extend line BF through the completed circle.