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Best Answer

Proper form first.

X2 + Y2 = 1

Y2 = 1 - X2

Y = (+/-) sqrt(1 - X2)

--------------------------

zero out the X

Y = (+/-) sqrt(1 - 02)

Y = 1

----------------the radius of this circle

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12y ago
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Q: Is equation is x2 plus y2 equals 1 what is the circles radius?
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