Answer:
1167°
Step-by-step explanation:
Sum is adding up all of the angles so,
285°+ 293°+ 294°+ 295°=1167°
(sorry if its not correct)
SinФ=-12/13
cosФ=Base/hypotenus
(hy)^2-(perpendicular)^2=(base)^2=13^2-12^2=5
cosФ=-5/13
I believe the answer is A. 20, 30, 40 is NOT a pythagorean triple.
