Napoleon, on a river bank, wanted to know the width of the stream. a
young soldier faced directly across the stream and adjusted the visor of
his cap until the tip of the visor was in line with his eye and the opposite
bank. next he did an about-face and noted the spot on the ground now
in line with his eye and visor-tip. he paced off the distance to this spot,
made his report, and earned a promotion. what postulate is this method
based on? draw a diagram to you explain.

i'm not sure i quite understand, could you provide more information?

slope is 35 and 20 miles is the y-intercept.

step-by-step explanation:

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet