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nohegarcia
 3 years ago
Find the area of the trapezoidal crosssection of the irrigation canal shown below. Your answer will be in terms of h, w, and θ.
http://www.webassign.net/hgmcalc5/15049.jpg
nohegarcia
 3 years ago
Find the area of the trapezoidal crosssection of the irrigation canal shown below. Your answer will be in terms of h, w, and θ. http://www.webassign.net/hgmcalc5/15049.jpg

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NoelGreco
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1346472458903:dw Can you calculate p from some trig function of theta ("th" is theta in drawing)

NoelGreco
 3 years ago
Best ResponseYou've already chosen the best response.0Yeah, but we really need to use p temporarily. First of all do you see how I got the theta near the p?

nohegarcia
 3 years ago
Best ResponseYou've already chosen the best response.0its a complmentary angle? sorry im totally lost

NoelGreco
 3 years ago
Best ResponseYou've already chosen the best response.0No, actually, it's congruent to the theta given in the problem because alternate interior angles of transversals and parallel lines are congruent. Does that ring any bells?

nohegarcia
 3 years ago
Best ResponseYou've already chosen the best response.0kindof but i dont know why you would do that

NoelGreco
 3 years ago
Best ResponseYou've already chosen the best response.0Well, if I knew an expression for p, I could say that the long base of the trapezoid was w + 2p, the other base is w, and we have h. That's all you need for the area of a trapezoid.

NoelGreco
 3 years ago
Best ResponseYou've already chosen the best response.0Isn't \[\tan \theta = \frac{ h }{ p}\]

nohegarcia
 3 years ago
Best ResponseYou've already chosen the best response.0yeah so what would the area be?
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