Question

what part of the circle below is highlighted in red?
a. chord
b. center
c. radius
d. diameter

Explanation:

A radius is a line segment from the center of a circle to any point on its circumference. In the given circle, the red - highlighted part is a line segment starting from the center (green dot) and ending at the circumference.

• A chord is a line segment with both endpoints on the circle (but not passing through the center in general).
• The center is a single point (the green dot here, not a line segment).
• A diameter is a chord that passes through the center and has both endpoints on the circle (it is twice the length of a radius).

Answer:

C. Radius