Answer:[tex]30 ^{\circ}[/tex]
Step-by-step explanation:
Given
One angle of a triangle measures 120
The other two triangles are congruent that is both remaining angles are equal
let us suppose the two angle be x
therefore 2x+120=180 (sum of angles of a triangle is 180)
2x=60
therefore [tex]x=30^{\circ}[/tex]
therefore angles of triangle are [tex]120^{\circ},30^{\circ},30^{\circ}[/tex]
