circle with a trapezoid inside.

A quadrilateral inscribed in a unit circle has sides of lengths s1, s2, s3 and s4 where s1s2s3s4.

Find a quadrilateral of this type for which s1=√2 and show s1 cannot be greater than √2.

Find a quadrilateral of this type for which s2 ≅ √3and show that s2 is always less than √3.

Find a quadrilateral of this type for which s3 ≅ 2 and show that s2 is always less than 2.

Find a quadrilateral of this type for which s4=2 and show that s4 cannot be greater than 2.