The radius of a semicircle is 16 in. What is the semicircle's diameter?
If the diameter of a circle is 32 cm, its radius is equal to ___ .
In the figure, O is the centre of a circle of radius 9 cm. Semicircle with Diameter OA cuts the circle at D and BC is a tangent through B.
If OA = 25 cm , then BC = ____.