Question

A great circle of a sphere is a circle

that divides the sphere into four parts

that intersects the sphere at one point

that is perpendicular to the radius of the sphere

whose plane passes through the center of the sphere

Answer 1

i think it's d

Answer 2

that is correct, think of the globe

now cut the globe in half along the equator to get the north and south hemisphere

the inner circle you see when you open up the globe is a great circle

Answer 3

here's another visual

Sphere:



Sphere with great circle