Question

How many triangles can be constructed with angles measuring 50,90,40

Answer 1

Answer: More than one

Explanation:

Answer 2

Only two triangles:
The 90* angle is stable, so you can change only the position of the 50* and 40* angles.
1 triangle: 40* is right to the 90*
2 triangle: 40* is left to the 90*

Hope this helped you!