First of all, since 2 sides are same, we know that this is isosceles.
Now, is it isosceles,
acute?
right?
obtuse?
That depends on the angles.
If all 3 angles are less than 90, it is isosceles acute.
If there is 1 right angle, that is isosceles right.
If there is 1 angle greater than 90, that is isosceles obtuse.
Now, we see that this triangle has 1 angle that is 90 degrees.
So, this is isosceles right triangle.
