The first triangle has one of its angles as a right-angle and the two sides that includes the right-angle are congruent.
Therefore, the first triangle can be classified as
a right-angled, isosceles triangle
The three angles of the second triangle are congruent.
Also, the three sides of the second triangle are congruent.
Therefore,
the second triangle can be classified as
an equilateral triangle
or an equiangular triangle
