Asked by Derek

The longest side of a triangle are 13 ft., 15 ft., and 11 ft.. Find the measure of the opposite longest side. Round your answer to the nearest degree.
A. 46 degrees
B. 58 degrees
C. 77 degrees
D. 103 degrees
Answered by oobleck
I'll disregard the garbled language, and just note that the largest angle will be opposite the longest side. Thus, it will be between the two shortest sides. So, using the law of cosines,
15^2 = 11^2 + 13^2 - 2*11*13 cosθ
Answered by anke
rip dude