What is the perimeter of a 81cm^2 area?
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Answer:
Volume of sphere is
Step-by-step explanation:
It is given that Hal says that volume of sphere is
Volume of sphere is given by
Now using 3.14 in place of
Now volume of sphere is
Therefore volume of sphere when we use 3.14 in place of is
And the Hal likely error is he uses directly for calculation of volume.
This then allows us to see exactly how and where the subtended angle θ of a sector will fit into the sector formulas. Now we can replace the "once around" angle (that is, the 2π) for an entire circle with the measure of a sector's subtended angle θ, and this will give us the formulas for the area and arc length of that sector
