Question

In circle R, RD(line over it) is a radius and DF (line over it) is a tangent segment which statement must be true?

Answer 1

We'll have an attached picture (Ignore the labeling). We can easily observe that DF (in the picture BC), cannot be equal to the radius. Then, we cannot also claim that RD=RF. And since we are talking about the tangent segment, we'll have a right triangle. The correct answer is C)