Question

Triangle property pls help

Answer 1

The sum has to be 180°, so: 2x-9+2x-6+x=180

you can solve it: 5x-15=180

x-3=36

x=36+3

x=39

so the angles are:

x=39

2x-9=2*39-9=69

2x-6=2*39-6=72