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.
As a polygon, a quadrilateral has a two-dimensional shape with four sides and four angles. Examples of quadrilaterals are rectangles, parallelograms, squares and rhombuses. Only squares and rhombuses are considered regular quadrilaterals because their sides are all the same length. A square is a quadrilateral with four congruent sides, with the opposite sides parallel, and four right angles. A rhombus has four congruent sides that do not form right angles. Learn more about Shapes