The only line that represents the diameter of the given circle is; Line EF.
- In geometry of a circle, the diameter is defined as a straight line that passes through the center of the circle and has its' 2 endpoints lying on the circle.
Now, in the circle given to us, we can see;
Line DC
Line EF
Line A F
Line EA
Line AB
- Now, among all the given lines, the only one that passes through the center A and has its' endpoints lying on the circle is Line EF.
- In conclusion, the only line that represents the diameter of the given circle is Line EF.
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