A diameter of a circle has endpoints at (4, 6) and the origin. Which point is also on the circle?
A. (–1, 2) B. (6, 3) C. (5, 0) D. (–1, 1) E. NOTA
Please explain.

Question

A diameter of a circle has endpoints at (4, 6) and the origin. Which point is also on the circle?
A. (–1, 2) B. (6, 3) C. (5, 0) D. (–1, 1) E. NOTA
Please explain.

campbell_st · Answer

find the midpoint  x = (4 + 0)/2    y = (6 + 0)/2   that will give the centre

campbell_st · Answer

then the equation is (x - h)^2 + (y-k)^2 = r^2   in this case r^2 = 52

(h, k) is the centre... 

sub in each point... to test

anonymous · Answer

answer is D (-1,1) please can you show more steps

anonymous · Answer

I didn't get it

directrix · Answer

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