Which of the following statements must be true about a square?
choose all answers that apply:

a
it has four sides of equal length.
b
it has four right angles.
c
it has two pairs of parallel opposite sides.

All answers A,B, and C are correct.

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.