Answer:

The triangle is a right isosceles triangle.

 Two sides of the triangle are the same length, 5 units. 

  The triangle has one right angle.

 DEFINITIONS:

properties of right triangles--mathematical ideas such as:

·        right triangles have exactly one right angle,

·        the acute angles of a right triangle are complementary,

·        the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs (Pythagorean Theorem).[1]