每日一题

Mathematics

A circle in the x y-plane has its center at (-100,221) and a diameter of 17. Which of the following is an equation of the circle?

A.(x+100)2+(y-221)2=72.25
B.(x+100)2+(y-221)2=289
C.(x-100)2+(y+221)2=72.25
D.(x-100)2+(y+221)2=289

答案和解析

答案：A

解析：

Choice A is correct.