Question

1. the angles of a triangle are in the ratio 2:3:4.find the angles

2.add:
(a) 4a²+5b²+6ab
(b)6a²-2b²
(c) 4b²-5ab

3rd question is up​

Answer 1

Step-by-step explanation:

1). Let the angles be 2x:3x:4x

2x+3x+4x=180°

=9x =180°

= x=180/9

x=20°

2x=2×20=40°

3x=3×20=60°

4x=4×20=80°