The sum of the angles in a triangle is always 180 degrees. To find the third angle when the other two angles are given, you can use the formula:
\[ \text{Third angle} = 180 - (\text{First angle} + \text{Second angle}) \]
In your case, the two angles are 25 and 68:
\[ \text{Third angle} = 180 - (25 + 68) \]
Calculating the sum of the first two angles:
\[ 25 + 68 = 93 \]
Now, substitute that back into the equation:
\[ \text{Third angle} = 180 - 93 = 87 \]
So, the third angle measures 87 degrees. The correct option is 87.