Przekształć wzór na pole trapezu, wyznacz x, P, h, y.
Wzór: (x+y)*h/2, gdzie x to górna podstawa trapezu, y to dolna podstawa, a h to wysokość.
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P = (x + y) * h/2 ---------- wyznaczone P
P = (x + y) * h/2 /*2
2P = (x + y) * h
h = 2P / (x + y) -------------- wyznaczone h
P = (x + y) * h/2 /*2
2P = (x + y) * h
2P = xh + yh
2P - xh = yh
y = (2P - xh) / h --------- wyznaczone y
P = (x + y) * h/2 /*2
2P = (x + y) * h
2P = xh + yh
2P - yh = xh
x = (2P - yh) / h --------- wyznaczone x
P = (x + y)*h/2
-------------------
(x + y)*h/2 = P I*2
(x + y)h = 2P
xh + yh = 2P
xh = 2P - yh /:h
x = (2P - yh)/h
--------------------
(x + y)*h/2 = P I*2
(x + y)*h = 2P
xh + yh = 2P
yh = 2P - xh /:h
y = (2P - xh)/h
-------------------
(x + y)*h/2 = P I*2
h(x + y) = 2P /:(x + y)
h = 2P/(x + y)
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