convert degree to radian...radian to degree

i just wanna make sure this ans. is right

find the radian measure of the angle with the given degree measure

72 degree
i got 2pie / 5 or 0.4

find the degree measure of the angle with the given radian measure


7pie/6

my answer is 210 degree

Thanks for the help

Both your answers are correct.

cool thanks...
im like confuse my teacher did it this easy way and im looking it up online and i see all these crazy things


i saw this
http://www.youtube.com/watch?v=awBYW4DRxsI

30 degree times pie/180
and the ans. was pie/6
i dont understand how he got that

i got 0.166

pi/180 times a degree will give you the answer you want in radians every time. I don't know how your teacher has taught you but that's how I was taught as well.

30/180 = 1/6 since 180/30 = 6

In your case 72/180 = 2/5 or .4 like you pointed out. Then you just multiply the pi in and you have your degrees converted to radians. Then its the exact opposite? I guess you could say to go the other way, 180/pi * radians = degrees. 180/pi * pi/6 = 30 since pi divides out to 1 and 180/6 = 30.

No more PIE. :roll:

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