Hi all! Thank you for taking the time to help me!

I can't seems to start this question. Hope someone can guide me in the right direction, thanks!

Attached is a picture of the diagram.

The question is

Given AD is tangent to the circle at A.

BCD is a straight line that intersects the tangent at D.

DHK is the angle bisector of Angle ADC and it cuts AC at H and AB at K.

a) show that HD * BD = KD * AD

* meaning multiply/product.

b) show that triangle AHK is an isosceles triangle.

Thank you!