When used as recommended, CCA-treated wood is harmless to. people, plants, and animals. Its use provides environmental. benefits as well as decades of service. Specify Wolmanized Â® wood and plywood for applications in which conditions conducive to termites and fungal decay are present.
A quadrilateral is a four-sided polygon with four angles. There are many kinds of quadrilaterals. The five most common types are the parallelogram, the rectangle, the square, the trapezoid, and the rhombus. Move your mouse cursor over the figures at the right to learn more.
A polygon with vertices (and sides) is known as an-gon. A polygon for which the only points of the plane belonging to two polygon edges of are the polygon vertices is said to be a simple polygon. If all sides and angles are equivalent, the polygon is called regular. Polygons can be convex, concave, or star. The word polygon derives from the Greek poly, meaning many, and gonia, meaning angle.. The most familiar type of polygon is the regular polygon, which is a convex polygon with equal sides lengths and angles.