a) 8^2+5^2
64+ 25
=89
89( square root)
9.43mm
b) sin x = O/h
= sin 72=O/10
sin72*10
9.51cm
c) sin x= o/h
= sin 42=13/h
= 13/sin 42
H= 19.4
These are just my answers for certain sides of these 3 triangles as the question doesnt specify what side or angle the candidate has to find.