Using the trigonometrical cosine formula for a triangle the angles work out as 28.91 degrees 31.99 degrees and 119.10 degrees which add up to 180 degrees.
47dm = 470cm
1 centimetre = 0.393700787 inches 470 centimetres = 185.03936989 inches
step by step or the answer at the bottom1. turn 5m in to cm 100cm in 1m so 500cm2. 500cm-30cm=470cmthe answer is 470cm or 4.7m