Question

How many radians account for circumference of a circle? How many steradians account for circumference of a sphere? ​

Answer 1

Answer:

6 side of sphere and the Cicumfrence of circle.

Answer 2

Answer:

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Explanation:

A sphere subtends 4 pi square radians (steradians) about the origin. By analogy, a circle subtends 2 pi radians about the origin. Numerically, the number of steradians in a sphere is equal to the surface area of a sphere of unit radius