Question

The angle of three triangle are x , (x+20) and (x+40) find the value x​

Answer 1

Answer:

$\color{black}\boxed{\colorbox{saffron}{Perimeter-sum\:of\:sides}}$

$\color{black}\boxed{\colorbox{saffron}{sum\:of\:angles\:=180°}}$

$180 = (x + 20) + x + ( + 40) \\ \\ = 180 = 3x + 60 \\ \\ = 180 - 60 = 3x \\ \\ = 120 = 3x \\ \\ = x = 40$

So,

x = 40°

x+20=40°+20=60°

x+40= 40+40= 80°