A circle has a chord that goes from (2 pi)/3 to (7 pi) / 8 radians on the circle. If the area of the circle is 8 pi , what is the length of the chord? | Socratic
Geometry: Why are there [math]2\pi[/math] radians in a circle? - Quora
How 360 degrees is equal to 2 pi radians - YouTube
A particle rotates along a circle of radius R=√(2m) .with an angilar acceleration α=π/4 rad/s^2 starting from rest. calculate the magnitute of average velocity of the particle over the time it rotates
Tau Day | No, really, pi is wrong: The Tau Manifesto by Michael Hartl