1cm²

Breite_b = 10 (slider from 1 to 10, step 1)
Länge_a = 10 (slider from 1 to 10, step 1)
A = (0, 0)
B: (Breite_b, 0.0)
C: (Breite_b, Länge_a)
D: (0.0, Länge_a)
Vieleck1, b, a, c, d = Polygon(A, B, C, D)
E = (0, 0)
F = (1, 0)
G = (1, 1)
H = (0, 1)
Vieleck2, e, f, g, h = Polygon(E, F, G, H)
Text1: "Umfang u " + " = " + (2.0 * Breite_b + 2.0 * Länge_a) + " cm"
TextVieleck1: "Flächeninhalt A " + " = " + Vieleck1 + " cm²"