Question

Graph x2 + y2 = 9. What are its lines of symmetry?
Someone please help me!
(Picture Below)

Answer 1

@phi , @jim_thompson5910 , @ghazi Help me please

Answer 2

@satellite73

Answer 3

@Hero

Answer 4

Any line you draw through the origin (0, 0) will divide the circle into two congruent semi-circles. Every line through (0, 0) is a line of symmetry.

Answer 5

Okay so how do i get my answer ?

Answer 6

Also, this is the equation of a cirlce with center at the origin (0, 0) and radius 3.

Answer 7

Alright. now what do i do ?

Answer 8

@mathstudent55 ??

Answer 9

From this info:
"Every line through (0, 0) is a line of symmetry."
You should be able to narrow down the choices.

From this info:
"Also, this is the equation of a cirlce with center at the origin (0, 0) and radius 3."
You should be able to get the exact answer.

Answer 10

I got it. Is my answer A ?

Answer 11

@mathstudent55

Answer 12

Correct

Answer 13

Yay :) Are you 100% Sure that it's right ?