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 rhombus is a four-sided shape where none of the angles are 90 degrees, opposite sides are parallel and all the sides are the same length. A rhombus has two lines of symmetry. A parallelogram is a four-sided shape where the opposite sides are parallel and the same length. rectangle has two lines of symmetry. Trapezium A trapezium is a four-sided shape where one pair of opposite sides is parallel and unequal. When the other sides are not parallel but are the same length, the shape is called an isosceles trapezium.