107 degrees
No
obtuse
A shape does not have a sum. You can sum its angles, the lengths of its sides, the areas of its faces and so on. But the shape does not have a sum, in itself.
The sum of the interior angles is 360 and the sum of the exteriors is 360 also.
The sum of 15 and 107 is 122.
122
The sum is 107
53+54 = 107. Far too easy.
107
45 + 46 + 47 + 48 + 107 + 108 = 401
-106, -107, -108
If my math is correct the answer is 107
107
107
107
107