In an isosceles triangle ABC, AB = BC, ∠B = 20◦. M, N are on AB and BC respectively such that ∠MCA = 60◦, ∠NAC = 50◦. Find ∠NMC in degrees.(MOSCOW MO , 1952)
In an isosceles triangle ABC, AB = BC, ∠B = 20◦. M, N are on AB and BC respectively such that ∠MCA = 60◦, ∠NAC = 50◦. Find ∠NMC in degrees.
(MOSCOW MO , 1952)