Answer:
Missing angle is 55° 
Explanation:
Given :-
-  One angle is 35° and one is 90°
To find:-
- Measurement of other angle
Solution:-
We know that the sum of all angles in a triangle is 180°
and let the unknown angle be x 
So , 
90°+35°+x = 180° 
x = 180° - 125° 
x = 55°