Question

What is the length of the circle's radius?

Answer 1

Does that help?

Answer 2

Yes very much thanks.

Answer 3

Do I take the sq. root of 25 then divide by 2?

Answer 4

Nope, no need to divide by 2 since the "hypotenuse" is the radius at every single x and y that satisfy this equation x^2+y^2=25.

If you wanted the diameter, then you'd take the square root and multiply by 2.

Answer 5

So 10, then divide by 2 which is 5?

Answer 6

Wait nvm. 2.5?

Answer 7

No 10? Ugh...

Answer 8

The radius is 10!

Answer 9

Wot. I think you're overcomplicating this. Start over haha.

No, the diameter is 10. The radius is 5.

Answer 10

Okay. Thank you. This is confusing.

Answer 11

So I take the square root of "c" then multiply that by 2, the divide by 2?

Answer 12

The equation of the circle is just saying that you have a triangle at a constant hypotenuse. Try to understand why the pythagorean theorem is the equation of a circle by drawing a bunch of different triangles in a circle: See how all these triangles have a hypotenuse that are exactly the same, the radius? That's why x and y are variables.

Answer 13

It might take a little why to understand this, but once you get it, you'll not have to think very hard about it anymore and have a deeper understanding of how circles and triangles are related! =D

Answer 14

Thank you so so much. :)

Answer 15

Cool glad I could help.