For triangle ABC ∠C = 90 Side AB = 20.1 Side BC = 4 Find the measure of ∠B
+37093 This is a RIGHT triangle (because one angle = 90 degrees)
Side AB is the hypotenuse ( if it was one of the legs it would have "C" in its name)
Side BC is the ADJACENT leg to angle B
COSINE = ADJACENT / HYPOTENUSE
COSINE B = 4/20.1
COS^-1 (4/20.1) = B = 78.52 degrees
