AG
Arsen Gevorgyan
Ответ
L A + L B + L C + L D = 360 град.
L A = L C
L B = L D =>
2 * (L A + L = 360
L A + L B = 180 => L B = 180 - L A
L B - L A = 40 => 180 - L A - L A = 40 => 2*L A = 140 => L A = 70 => L B = 180 - L A = 180 - 70 = 110 =>
L A = L C = 70
L B = L D = 110