2007-04-09 07:56:17 · 5 answers · asked by bekah_2009 2 in Science & Mathematics ➔ Mathematics
The radius is the distance from the center to any point on the circle. So, since (-6,8) is a point on the circle, you can use the distance forumula this way:
D = sqrt[(x1-x2)^2 +(y1 - y2)^2]
D = sqrt[(-6-0)^2 + (8-0)^2]
D = sqrt[36 + 64] = sqrt[100]
D= 10.
2007-04-09 08:02:38 · answer #1 · answered by chancebeaube 3 · 0⤊ 0⤋
Use the Pythagorian thoerem.
a^2 + b^2 = c^2
(-6)^2 + 8^2 = c^2
36 + 64 = c^2
c=10
Radius equal 10
2007-04-09 08:00:44 · answer #2 · answered by trojanknight_96 3 · 0⤊ 1⤋
x^2 + y^2 = r^2
(-6)^2 +(8)^2 = r^2
36 + 64 = 100
r = 10
x^2 + y^2 = 100
2007-04-09 08:01:14 · answer #3 · answered by Brian D 5 · 1⤊ 1⤋
use distance fomula
r^2 = (-6 - 0)^2 + (8 - 0)^2
r^2 = 36 + 64
r^2 = 100
r = 10
2007-04-09 08:02:08 · answer #4 · answered by 7 · 1⤊ 1⤋
10, use the distance formula for the radius or u can use the circle formula
2007-04-09 08:00:00 · answer #5 · answered by saeuta 3 · 0⤊ 1⤋