Question

ΔABC
m(∡A)= 3x+30°
m(∡B)= 50°+ x
m(∡C)= 80°- 2x
Dem ca [BM]=inaltime
Help plss

Answer 1

m(A)+m(B)+m(C)=180°
3x+30°+50°+x+80°-2x=180°

2x+160°=180°
2x=180°-160°
2x=20°
x=20°:2
x=10°

m(A)=3x+30°=3•10°+30°=30°+30°=60°

m(B)=50°+x=50°+10°=60°

m(C)=80°-2x=80°-2•10°=80°-20°=60°