Parallelogram Area b h b base h vertical height. The area is length times width. For cones with slant height l and radius r surface area is calculated using this formula.
The area of a kite or rhombus with diagonal length d 1 and d 2 is.
Trapezoid US Trapezium UK Area ½ab h h vertical height. Trapezoid US Trapezium UK Area ½ab h h vertical height. The equation for calculating the area of a rectangle is as follows. So the area of the rectangle is 2 pi r h.