AB= root number 12.25=3.5

According to the area of the triangle: AB*CD=AC*BC, CD=AC*BC/AB= 1.68.

2.AD 2+CD 2 = AC 2 AD 2 = 1.5876, so AD= 1.26.

BD 2+CD 2 = BC 2 BD 2 = 5.0 176, so BC=2.24.