Which equation can be used to find the measure of angle GFE? cos−1(StartFraction 14.5 Over 11.9 EndFraction) = θ

cos−1(StartFraction 11.9 Over 14.5 EndFraction) = θ
sin−1(StartFraction 11.9 Over 14.5 EndFraction) = θ
sin−1(StartFraction 14.5 Over 11.9 EndFraction) = θ

Answer is in the photo. I can't attach it here, but I've uploaded it to a file hosting. link below! Good Luck!

cutt.ly/XzW3SUN

what i would say the best answer is a. 40.5

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180