She can draw a triangle and then write the lenghts of the triangles with the same numbers
3+3 because I use the rule "same sign sum"
The answer is 130.
91 is 70% of price
100% of price is (91×100)/70=130
<span>Let
h------------> height of window </span>
we know that
tan 51°=h/6-------> h=6*tan 51°-------> h=7.4 m
the answer is
h=7.4 m
see the attached figure