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The picture shows a barn door: A barn door has two parallel bars. A support AB runs across the diagonal between the two parallel bars. The angle made by the diagonal with the parallel bar on top is 60 degrees. The distance between the two parallel bars is 9 feet. What is the length of the support AB?

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MissPhiladelphia
In the image created, we can see that we can apply sin ∅ = opposite / hypotenuse. the opposite side is the distance between 2 parallel bars and the ∅ is the angle made by the diagonal on top. 

Given: 
∅ = 60°
Opposite = 9 ft

Hypotenuse = 9 / sin 60 = 10.39 ft

the length of the support AB is 10.39 ft

Ver imagen MissPhiladelphia

Answer:

10.39 ft

Step-by-step explanation:

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