Question

the angles of triangle are (3x-2), 2(x+1), 10(x+12) find x

Answer 1

add the angles and equate it to 180.

3x-2+2x+2+10x+120=180
15x=60
x=4

Answer 2

We know that the internal angles of a triangle equal to 180, as (n-2)*180 where n is number of side, is true for every shape. Here, n is 3. So, (3-2)*180 = 1*180 = 180.
Thus, the equation equals to 180.

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