NEED HELP! Consider circle C with diameter DE.

Which is the equation of circle C?

A.
(x − 2)2 + (y + 1)2 = 185
B.
(x − 2)2 + (y + 1)2 = 370
C.
(x − 2)2 + (y + 1)2 = 740
D.
(x + 9)2 + (y − 7)2 = 185
E.
(x + 9)2 + (y − 7)2 = 740

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex