1 + 2 = 3
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.
720 degrees
two (2)
1 + 1 = 2
The arithmetic mean.
an + an = 2an; an x an = an + n
There is only one prime number between 1 and 2, this is 2. The sum is therefore 2.
A sum of 4 is more likely. Out of the 36 possible outcomes with a pair of 6-sided dice, only one will have a sum of 2 {1-1}. Three of the possibilities sum to 4. {1-3, 2-2, 3-1}
1/2+1/2=1 1/3+1/3=2/3 1-2/3=1/3 Answer: 1/3
The sum of 2 1/2 and 5/3 is 4 1/6.
Adding up all the even numbers from the first (2) to the fiftieth (100): [(100 + 2) / 2] x 50 = 2550 Can you see the logic of this method?
12 meters