Question

determine x em cada um dos triângulos A 35 graus, x,40 graus ,B 3x,5x,x.C 60 graus, x+30 graus, x

Answer 1

A)35º,X,40°
35 + X + 40 = 180
X + 75 = 180
X = 180 - 75
X = 105°
B)3X,5X,X
3 X + 5 X + X = 180
9 X = 180
X = 180/9
X = 20
C)60 + X + 30 + X = 180
60 + 30 + 2 X =  180
90 + 2 X = 180
2 X = 180 - 90
2 X = 90
X = 90/2
X = 45