Answer:
Explanation:
make a proportion
height = 1.8 = x
distance from foot of ladder 1.2 3
to fence and then to building
Distance from foot of ladder to building is 3
1.2 + 1.8 = 3
cross multiply 1.8 times 3 = 5.4
divide by 1.2 = 4.5
the height the ladder reaches is 4.5