Question

any one solve this questions fast please ​

Answer 1

1) 2x+3x+4x=180°

= 9x=180°

Therefore, x=20°

2) 2x+3x+90°=180°

= 5x+90°=180°

= 5x=90°

Therefore, x=18°

3) x+x+30°=120° [exterior angle property of triangle]

= 2x+30°=120°

= 2x=90°

Therefore, x=45°

4) angle ABC = 180°-120° [Supplimentry angles]

hence, angle ABC = 60°

Because the triangle has 2 sides equal, angle ACB is also 60°

now, x=180°-(60+60)°

= x=180°-120°

Therefore, x=60°

5) x= 50°