You need to find the width of the stream. you cannot measure the width directly, so you draw a diagram showing lengths that you can measure. your diagram contains two similar triangles, one in the stream and one on land. use the diagram to find the width of the stream. math item stem image

b

step-by-step explanation:

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,