Question

find the answer of the following class -9 ​

Answer 1

Step-by-step explanation:

Let the angles be 2x,3x and 4x

Now, 2x+3x+4x=180

9x=180

x=20

So the angles are 40,60 and 80 respectively

Answer 2

b) 40,60,80

Step-by-step explanation:

$2x + 3x + 4x = 180 \\ 9x = 180 \\ x = 180 \div 9 \\ x = 20 \\ so \\ 2x = 2 \times 20 = 40 \\ 3x = 3 \times 20 = 60 \\ 4x = 4 \times 20 = 80$