Which two angles must be congruent? angle S angle T angle S = angle U angle T = angle U

An angle with all equal angles is called an equilateral triangle, and another property of equilateral triangles is that all of their sides are the same measure.

So, Jerome could measure all the sides of the triangle and prove that all the angles are equal because of the above statement.

Good luck, and I hope I helped!

Step-by-step explanation: