Prove a triangle is an isosceles triangle ith P(2,3) A(5,7) and T1,4)
Compare the distance between P and A with the distance between A and T. Use the Pythagorean Theoerem.
Both look like 5, to me. That makes A the apex.
Q.E.D.
Both look like 5, to me. That makes A the apex.
Q.E.D.