Răspuns:
BC = BM = AD = AM => ΔBMC = ΔADM =>
=> ∡BMC = ∡AMD = (180° - ∡CBM)/2
∡CBM = 90° + 60° = 150°
∡BMC = ∡AMD = (180° - 150°)/2 = 30°/2 = 15°
∡DMC = 60° - (∡BMC + ∡AMD)
= 60° - 30°
= 30°
Raspuns corect
b) 30°
