Answer:
c² = a² + b² - 2ab×cos(C)
c = 7.7
Step-by-step explanation:
we use the enhanced Pythagoras for general triangles :
c² = a² + b² - 2ab×cos(C)
c² = 16² + 10² - 2×16×10×cos(22) = 256 + 100 - 320×cos(22) =
= 356 - 320×0.92718... = 356 - 296.698... ≈ 59.3
c ≈ 7.7
as you can see, the "regular" formula of Pythagoras
c² = a² + b²
is derived from the fact that cos(90)=0.
