Find the measure of the largest acute angle in a 5-12-13 triangle.

Answer 1

You should recognize this to be a right-angled triangle, since
5^2 + 12^2 = 13^2

tanØ = 12/5 = 2.4 , where Ø is the angle opposite the 12 side

Ø = appr 67.4°

Answer 2

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