Question

Given: Circumscribed ABCD, AB=5,AD=8, CD=10. Find: BC

Answer 1

Answer:

BC=7

Step-by-step explanation:

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

Thus,

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