Question

Which of the following points lies on the circle whose center is at the origin and whose radius is 10?
(-6, 4)
(, )
(6, -8)

Answer 1

the second one is \[\sqrt{10},\sqrt{10}\]

Answer 2

x^2 + y^2 = 100

plug in each coordinate and see which sums up to 100

Answer 3

here is the standard form of a circel with center (0,0) and radius 10:

x^2+y^2=100, test out your points , see which one give you 100=100

Answer 4

basically trial and error

Answer 5

basically

Answer 6

ok ill try

Answer 7

would it be sqrt of 10 then