◡KT + ◡TM + ◡KM = 360
7x + 4x + 140 = 360
11x = 220
x = 20
◡KT = 7 * 20 = 140
◡TM = 4 * 20 = 80
∠MKT = 1/2 * ◡MT = 1/2 * (◡KM + ◡KT) = 1/2 * (140 + 140) = 1/2 * 280 = 140
Ответ: 140