Answer:
C.chord po or diameter
Step-by-step explanation:
A chord of a circle is a straight line segment whose endpoints both lie on a circular arc. The infinite line extension of a chord is a secant line, or just secant. More generally, a chord is a line segment joining two points on any curve, for instance, an ellipse...
diameter explanation
The diameter is the length of the line through the center that touches two points on the edge of the circle.
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