Diameter

If the endpoints of the diameter of a circle are A(10, -10) and
B (9, -2), what is the circle's radius?

Final Answer:

r =  4

Step-by-step explanation:

A=(10,10) B=(9,2)  (2r)2 = Δx2 + Δy2 d2 = Δx2 + Δy2 d=dist(A,B)=AB=(AxBx)2+(AyBy)2=(109)2+((10)(2))2=658.0623  r=d/2=8.0623/2=4



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