Pascal's triangle Construct a "d"-dimensional triangle (a 3-dimensional triangle is a tetrahedron) by placing additional dots below an initial dot, corresponding to P(1) = 1. Place these dots in a manner analogous to the placement of numbers in Pascal's triangle. To find P("x"), have a total of "x" dots composing the target shape. P("x") then equals the total number of dots in the shape. A 0-dimensional triangle is a point and a 1-dimensional triangle is simply a line, and therefore P("x") = "1" and P("x") = "x", which is the sequence of natural numbers. The number of dots in each layer corresponds
Laundry symbol in the triangle prohibit chlorine bleaching. A crossed triangle prohibits any bleaching. A "circle in the square" symbolizes a clothes dryer. One dot requires drying at reduced temperature and two dots for normal temperature. The crossed symbol means that the clothing does not tolerate machine drying. In the U.S. and Japan, there are other icons for natural drying. The "iron" with up to three dots allows for ironing. The number of dots are assigned temperatures: one prescribes 110°C, two for 150°C and three for 200°C. An iron with a cross prohibits ironing. A "circle" identifies the possibilities of professional cleaning.