Answer
Александр
The correct choice:
90 degrees.
Let's label the angles according to their proportion 2X, 3X, 5X.
Make an equation:
2*X+3*X+5*X = 180
Solving the equation:
10*X = 180 degrees.
X = 18 degrees.
Find the measure of the largest angle in this room.
5*X = 5*18 = 90 degrees.