ABCD patrulater deci are masura tuturor unghiurilor este de 360°
{a,b,c,d}⇔{2,3,5,6} => a/2 = b/3 = c/5 = d/6 = K => a = 2K, b=3K, c=5K, d=6K
a+b+c+d = 360° => 2K+3K+4K+6K = 360° => 15K = 360° => K = 360/15 = 24°
∡A = 48°, ∡B= 72°, ∡C= 96°, ∡D = 144°