A sphere looks like a circle from any angle or direction.
(That's one of the ways people knew that the Earth is a sphere ... every time there's
a lunar eclipse, the Earth's shadow always has a circular shape when the moon crosses
through it, no matter which way the Earth is turned.)
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Any view of a sphere will be a circle.
circle
A straight line passing from side to side going through the middle of a circle or sphere is a diameter.
a sphere is called a sphere because , well , its just a other name for a ball such as the earth.
The side length of a cube that has the same volume of a sphere with the radius of 1 is: 1.61 units.