6. What is the equation of a circle whose center is at the point (-2,3) and its diameter has a length
of 10?
A. x2 + y2 + 4x – 6y - 80 = 0
B. x2 + y2 + 4x - 6y - 10 = 0
C. x2 + y2 + 4x - 6y - 12 = 0
D. x2 + y2 - 4x + 6y - 12 = 0
7. What is the radius of the circle given the endpoints of the diameter of a circle (2,0) and (0, -2)?
A. 2
B. 2
C.22
D.4
8. What is the perimeter of an equilateral triangle whose two of its vertices are located at (-5, 0)
and (-2,-3)?
A. 3
B. 32
C. 9
D. 912​