If the angles of a triangle are 45°, 45° and 90°, then the triangle is ___.
an equilateral triangle
an isosceles triangle
a right angle triangle
a right-angled isosceles triangle
In a right-angled isosceles triangle, one angle is right angle and the remaining two angles are equal to 45º.
If a triangle has angles 45∘,45∘, and 90∘, what is the ratio of the sides of the triangle opposite to these angles respectively?
If two of the angles of a triangle are 90º and 45º, what is the third angle?