two sides of a triangle have the same length. The third side measures 5 m less than twice the common length. The perimeter of the triangle is 11m. What are the lengths of the three sides?

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

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