A circles equation is xsquared+ysquared=180 is the point (6,k) is on the circle, determine a value for k.
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Originally Posted by euclid2 A circles equation is xsquared+ysquared=180 is the point (6,k) is on the circle, determine a value for k. The statement (6,k) is on the circle $\displaystyle x^2 + y^2 = 180$ means x=6 and y=k satisfies $\displaystyle x^2 + y^2 = 180$ So substitute x=6 and y=k and find out k.
Originally Posted by euclid2 A circles equation is xsquared+ysquared=180 is the point (6,k) is on the circle, determine a value for k. x^2+y^2=180 since (6,k) lie on circle,it will satisfy the equation.so 6^2+k^2=180 k^2=180-36=144 so k=+-12(i.e plus minus 12)
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