What is the measurement of theta in degrees?

Hello from MrBillDoesMath!

 48.2 degrees

Discussion:

In the diagram, "6" is the x- distance along the side adjacent to theta, and  

3 * sqrt(5) is the y-distance along the side opposite angle theta.

By definition of tangent of angle, using "@" for theta, we have

tan (@)        =  opposite/adjacent = 3 * sqrt(5) / 6  = sqrt(5)/2

So @ = (inverse tangent (sqrt(5)/2) )  =  48.189 degrees (approximately)

Thank you,

MrB

step-by-step explanation:

it's is b

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)