Question

What is the definition of a sphere?
A. A two-dimensional figure where all points are equidistant from the center.
B. A two-dimensional figure with circular bases.
C. A three-dimensional figure where all points are equidistant from the center.
D. A three-dimensional figure with circular bases.

Answer 1

its gotta be B right?

Answer 2

nope. A sphere looks like this: http://en.wikipedia.org/wiki/Sphere

Answer 3

soo A ?

Answer 4

or is that seriously a three dimensional shape?

Answer 5

it's 3-dimensional

Answer 6

it's like the 3-D version of a circle

Answer 7

okay so that makes it D then?

Answer 8

i looked it up yo double check and stuff came up as a sphere being 2-d .. so i was second guessing myself this whole time.

Answer 9

C

Answer 10

yes it's C. Think of a circle... it has a center and all distances from the center to the circumference are the same length. This is analogous to the sphere where the distances from the center of the sphere to the surface of the sphere are the same length

Answer 11

well technically a sphere is 2d(its very confusing) but in most cases when we say sphere we are talking about option 3.

Answer 12

two dimensional would be a circle... it would be flat. three dimensional is when it pops up... think 3D movies :)

so spheres are the pop out versions of circles so i would say C is the best choice...

@zzr0ck3r oh really?! they're considered 2D? i didn't know that :P lol

Answer 13

A sphere is "surface , wrapped into a ball "

Answer 14

its only the "skin" of a ball...

Answer 15

well thatas what i thought! and then it came up a 2D sphere and im sitting here like, nahh that cants be it, but i cant get this wrong cause then ill just feel stupid, but 2D, really? lol. im so glad i have you guys!

Answer 16

A Ball in 2d is a circle, and in 3d is what we call a sphere, and there are balls in R^n for any n

Answer 17

which is what this question( I believe ) is calling a sphere.