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How many steradians in a hemisphere?
There are 2*pi stradians or tau steradians in a hemisphere.
What is the radian of a straight line?
There is no "radian of a straight line", as far as I know. A radian is a unit of angular measurement - defined in such as way that a complete circle (also known as 360°) is equivalent to 2 x pi.
How many revolution are there in radian?
1 revolution = 2 x pi radians. Therefore, 1 radian = 1 / (2 x pi) revolutions.
12 feet into radians?
No such conversion is possible. Feet are a measure of distance or linear displacement whereas a radian is a measure of angular displacement. The two measure different things and it is not possible to convert form one to the other.
What is mode on a calculator?
On many calculators, the MODE key/button is to set the calculator into degrees or radian angle measurment, that is, when you enter a value, it and all further values you enter will then either be understood by the calculator as a degrees or radian value for an angle.
