Question

Hello me with A and B please. And explain how to do it if you can.

Answer 1

a) The larger and small triangles are similar, so

8/10 = x/15
x = (8*15)/10 = 12

b)find the altitude x
tan 40 = x / 5
x = 5 tan 40 = 4.195


By Pythagoras theorem:-

y = sqrt ( 4.195^2 + 11^2)

y = 11.8 to 3 significant figures