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Find the area of the trapezoidal cross-section of the irrigation canal shown below. Your answer will be in terms of h, w, and θ. http://www.webassign.net/hgmcalc5/1-5-049.jpg

Mathematics
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|dw:1346472458903:dw| Can you calculate p from some trig function of theta ("th" is theta in drawing)
1/2*p*h=area?
Yeah, but we really need to use p temporarily. First of all do you see how I got the theta near the p?

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Other answers:

its a complmentary angle? sorry im totally lost
No, 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?
kindof but i dont know why you would do that
Well, 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.
Isn't \[\tan \theta = \frac{ h }{ p}\]
yeah so what would the area be?
tan(theta)*p/h

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