Answer:
it is an equilateral triangle because all three sides are equal
therefore all angles are also equal
4x + 4x + 4x=180
12x=180
x=180/12
x is equal to 15
4 x is equals to 4 x 15 is equal to 60
4 x + y is equals to 180 degree because of linear pair
60 + y is equal to 180 degree
y is equal to 120
