Two similarities between a right-angled triangle and an obtuse angled scalene triangle are:
1. Both triangles contain two acute angles.
2 The side opposite to the right angle is the longest side in a right isosceles triangle. Similarly, the side opposite the obtuse angle is the triangle’s longest side.
Two differences between a right-angled triangle and an obtuse angled scalene triangle are tabulated below:
| Right-angled isosceles triangle | Obtuse angled scalene triangle |
| The greatest angle is the right angle, i.e. 90 degrees. | The greatest angle is obtuse angles, i.e. greater than 90 degrees |
| The sides adjacent to the right angle are congruent. | All three sides are of different lengths. |
