5.
apply the trigonometric function:
Tan a = opposite side / adjacent side
Where:
a = angle
opposite side = 5.67
adjacent side = 9.12
Replacing:
Tan a = 5.67/9.12
a = Arc Tan (5.67/9.12)
a = 31.86 = 32
Since it is a right triangle, it has a right angle (90°), and the sum of angles is 180°.
b = 180 -32 - 90
b= 58
So, each angle is:
32 , 58 , 90
