No, examples: Isosceles right angled triangle ( 90º : 45º : 45º ), link: TrianCal Isosceles non-right angled triangle ( 120º : 30º : 30º ), link: TrianCal. read more
Answer : No. A right angled triangle is one with an angle 90 degrees. The other two angles of this triangle can be equal or not. read more