what do opposite sides of a dice add up to
Dice Opposite sides of a modern die traditionally add up to seven, implying that the 1, 2 and 3 faces share a vertex.[14] The faces of a die may be placed clockwise or counterclockwise about this vertex. If the 1, 2 and 3 faces run counterclockwise, the die is called "right-handed", and if those faces run clockwise, the die is called "left-handed". Western dice are normally right-handed, and Chinese dice are normally left-handed.[15]
Order of operations These mnemonics may be misleading when written this way,[6] especially if the user is not aware that multiplication and division are of equal precedence, as are addition and subtraction. Using any of the above rules in the order "addition first, subtraction afterward" would incorrectly evaluate the expression[6]
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Arithmetic progression The behavior of the arithmetic progression depends on the common difference d. If the common difference is:
Perpendicular The legs of a right triangle are perpendicular to each other.
Vein Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.