Basic Geometric Concepts: In the image point A is the center of the circle. Which two line segments must be equal in length?

he answer

the true answer is  

EF¯¯¯¯¯ and HI¯¯¯¯

proof

the line EF passes on A, and so does the line HI. both line are called diameter of the circle, that means

EF = HI

Step-by-step explanation:

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.