You can use a tangent:

We have opposite = 17 and adjacent = x.

substitute:
cross multiply
multiply both sides by √3

divide both sides by 3

Use the Pythagorean theorem:

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Other method.
triangle.
The sides are in the ratio 
Therefore

Answer:
sorry where is figure.
Step-by-step explanation:
area of triangle ABE=area of triangle BE3
Answer:
don't bjjjjjjjjj*jjjjjjjjjjj
Answer:
Slope is 7/3
Step-by-step explanation:
20 divided by four is 5 so maybe it is four.
I tried