1 треуг.
С = 50
ABD = CBD = 40
2 треуг.
B = C = D = 60
ACD = ACB = 30
3 треуг.
A = 61
1.
∠ACB = 50°
∠ABD = ∠CBD = (180−50−50)/2 = 80/2 = 40°
2.
∠DCB = DBC = (180−60)/2 = 120/2 = 60°
∠ACB = ∠ACD = 90−60 = 30°
3.
∠CAB = 90−29 = 61°
1 треуг.
С = 50
ABD = CBD = 40
2 треуг.
B = C = D = 60
ACD = ACB = 30
3 треуг.
A = 61
1.
∠ACB = 50°
∠ABD = ∠CBD = (180−50−50)/2 = 80/2 = 40°
2.
∠DCB = DBC = (180−60)/2 = 120/2 = 60°
∠ACB = ∠ACD = 90−60 = 30°
3.
∠CAB = 90−29 = 61°