Question

Given: Circumscribed ABCD, AB=5,

AD=8, CD=10.

Find: BC

Answer 1

BC=7

Explanation:

The circle can be circumscribed into the quadrilateral, if the sums of the opposite sides of the quadrilateral are eqaul.

Thus,

`AB+CD=AD+BC,\\ \\8+BC=5+10,\\ \\BC=15-8=7.`