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The center of a circle is at the origin. An endpoint of a diameter of the circle is at (-3 -4). How long is the diameter of the circle?
Wiki User
∙ 7y ago
Find the distance between the point (-3, -4) and the origin to find the radius of the circle.
This is the distance formula:
d = ( ((x2 - x1)^2) + ((y2 - y1)^2) ) ^ 0.5
These are the points:
(x1, y1) = (0, 0)
(x2, y2) = (-3, -4)
d = ( ((-3 - 0)^2) + (-4 - 0)^2) ) ^ 0.5
d = ( (-3^2) + (-4^2) ) ^ 0.5
d = ( 9 + 16 ) ^ 0.5
d = ( 25 ) ^ 0.5
d = 5
Now that you know the radius of the circle, to find the diameter, just double it.
5 * 2 = 10
The diameter of the circle equals 10.
Wiki User
∙ 7y ago
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