Is this shape a sphere? Use the definition to justify your response.
Yes! This shape is a sphere. It’s round and three-dimensional. The surface is solid, and every point on the surface is the same distance from its center.
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Before we calculate the volume of different spheres, let’s define and identify them.
Let’s start with the definition of a sphere.
Definition of a Sphere
A sphere is a three-dimensional, round figure with a solid surface. Every point on the surface is the same distance from the center.
Examine this shape. It’s a three-dimensional figure with circles on both ends. Is this a sphere?
No. This shape is not a sphere. Several points on the surface are different distances from the center. For example, points on the bases are farther away from the center than points in the middle. This shape is a cylinder.
Look at this three-dimensional shape. Is this shape a sphere? Why or why not?
No. This shape is not a sphere. It’s not round and has no well-defined center. This shape has a circular base and tapers to a point. This shape is a cone.
