Question

find X in the following questions​

Answer 1

Answer:

x=40

Step-by-step explanation:

2x+x120  (sum of two int. angle=one ext. angle)

3x=120

x=40

.....

then, put the value of x to find the value of third angle which is y

2*40+40+y=180

80+40+y=180

120+y=180

y=60

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Answer 2

Answer:

let us name third side be y

as we know the sum of all the sides of triangle is 180°

so, 2x+x+y=180°---------(1)

Now, 120°+y=180°

so, y=60°

Putting all values in equation 1 we get,

x=40°