Answer:
8.6
Step-by-step explanation:
First look at the small triangle and find the angle that is common between the big and small triangle.
TanФ=Opp/Adj
TanФ=2/3
now look at the big triangle,
again TanФ= h/13
we know tanФ=2/3,
∴2/3=h/13
(2/3)*13=h
h= 8.6
