The sum of 8 and 2 is 10
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The sum of the internal angles of a heptagon is 900 degrees. This can be found be multiplying one angle, 128 and four sevenths, by 7.
The sum of -1 and -1 is -2.
The sum of the exterior angles of a convex polygon which has sides and one angle at each vertex is 360 degrees.
720 degrees
1 + 1 = 2
two (2)
an + an = 2an; an x an = an + n
The arithmetic mean.
4904
There is only one prime number between 1 and 2, this is 2. The sum is therefore 2.