Answer:
60°
Explanation:
Since the sides have all got the "equal" sign, all the angles must be the same.
Angles in a triangle add up to 180°.
From this, we can set up an equation ⇔ y + y + y = 180°
⇒ y + y + y = 180°
( Simplify )
⇒ 3 y = 180°
( Divide both sides by 3 to isolate y )
y = 60°