A

T

Area T del trapezio

b = 1 (slider from 1 to 5, step 0.1)
f(x) = If[1 ≤ x ≤ 5, x + 1]
g: y = 5 - x
A = Intersect(f, yAxis, (0, 4))
B: (b, b + 1)
C: (b, 0)
h = Segment(B, C)
O: (0, 0)
q1, o, c, b_{2}, a = Polygon(O, C, B, A)
D = Point(f)
E = Point(xAxis)
i = Segment(D, E)
q2, d, e, c_1, b_1 = Polygon(D, E, C, B)
testo1: "T=" + (LaTeX[q2]) + ""