Opposite sides of a dice add up to 7
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To create a net for a standard die, opposite sides must add up to 7. The numbers on opposite sides of a die always sum to 7. Given the numbers 6, 4, and 2, we need to place the numbers that sum up to 7 on the opposite sides. The numbers that complete the die are 1 opposite 6, 3 opposite 4, and 5 opposite 2.
If it has 2 opposite parallel sides of 10 cm and 2 opposite parallel sides of 5 cm then its perimeter is the sum of the 4 sides which is 30 cm
the opposite of a sum is the difference
The largest possible sum with 2 six sided dice is 12.
A normal die has the numbers 1,2,3,4,5 and 6 on its faces. The numbers are arranged so that those on opposite faces of the die sum to seven. This then means that the number 1,2 and 3 share a vertex. When viewed from above the vertex, these three numbers usually go in a counterclockwise direction. This is a right-handed die. Left-handed dice, where the three numbers are in a clockwise configuration, also exist.