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.
There is a family of shapes called polygon. A polygon is a two-dimensional figure that is composed of straight line segments bounded together. It has many angles. Triangles, square and rectangles are also types of polygon. A triangles is a three-sided polygon, while a square and rectangle are four-sided polygons.