Question

The angles of a triangle are(x+10),(2x+30)and x .find the value of x.

Answer 1

x+10+2x+30+x = 180° ( angle sum property of a triangle )
4x + 40 = 180
4x = 180-40
4x = 140
x = 140/40
x= 35°

Answer 2

x+10+2x+30+x=180°(angle sum property)
4x+40=180°
4x=(180-40)°
4x=140°
x=140/4=35°
first angle=35°
second angle=x+10=35+10=45°
third angle=2x+30=2×35+30=70+30=100°