Question

Convert the radian measure to degree measure. Use the value of π found on a calculator and round answers to two decimal places.
9pi/4

Answer 1

Just curious, do you have your unit circle values for radians memorized, e.g. pi/6, pi/4, pi/3?

Answer 2

not yet.. im working on it

Answer 3

are you using a scientific calculator?

Answer 4

type in 9pi/4 in radian mode.
press 2nd function
press the (change degree mode) button till it goes to degree and the conversion is done

Answer 5

these are the answer choices..

A. 200π°

B. 405°

C. 160°

D. 324°

Answer 6

No problem. Okay, so let's put the value 9pi/4 into a whole number based on that. So, if 8pi/4 is equal to 2pi, 9pi/4 must be equal to 2pi plus pi/4, right?

Answer 7

Yes

Answer 8

2pi is equal to 360 degrees, and pi/4 is equal to how many degrees, if pi is the angle of a semicircle, or 180 degrees?

Answer 9

would it be 160 then

Answer 10

?

Answer 11

Back, sorry. Sorry, but I don't believe so. If you divide 180/4, (because pi is 180), what do you get?

Answer 12

45

Answer 13

Yup. So, adding together 2pi and pi/4, what would be your sum in degrees?

Answer 14

hm..im not sure if it did it right..

Answer 15

let me see.. hmm

Answer 16

im kinda comfusing myself..

Answer 17

is it 405?

Answer 18

Back. Yeah, exactly.

Answer 19

okay, now i get it!! i know the steps..thank you!!

Answer 20

you could also do the same as others were saying by using your calculator to converts, but it's good to know how to do it with radians because of their usefulness later on. Just to make sure, do you know how to do it on a calculator, like those dudes were saying?

Answer 21

kinda.. im alil slow on it but i kinda understand