13. Which of the following is a true statement about a tangent and a radius? A. A tangent and a rzőius in a cylinder form two legs of a right triangle with the cylinder's zittade serving as the bypotese
B. A tangent and a radius of a hexagon are always equal lengths.
C. A tangenizand a radius intersect at the foci of an ellipse.
D. A tangent and a radius of a circle meet to form a 90° angle.