What is the area of a square with a side of #6#? For finding the area of a composite figure that contains. #color(red)'side'^color(red)2# (this means #'side'#xx#'side'#) In reality, not every plane surface can be clearly classified as a rectangle, square or a triangle. Squares are types of rectangles, so you can get their area by using the formula:īut squares are special because their width and height are always the same, so the special formula for squares is: Therefore, the surface area of the rectangle is 50 cm. Example: Calculate the surface area of a rectangle whose length is 10 cm and width 5 cm. Formula to calculate the surface area of a rectangle. For this shape, the lateral surface area is quite easy to calculate as it’s made up of 3 rectangles which have one length of the side in common.

What about a triangle that is a little weirder? Well, no matter the shape of the triangle, the area is ALWAYS half the altitude times the base. Since a rectangle is a 2 dimensional shape, so its surface area is the same as its area.

Say you have a triangle with a base of #5# and an altitude of #9#. Triangle area is ALWAYS: #color(red)(1/2)#color(red)'base'#xx#color(red)'altitude'# Say you have a rectangle with a width of #4# and a height of #8# what is the area? Supplied with a plethora of exercises, this collection of printable worksheets. At the heart of figuring out the surface area of a rectangular prism is knowing how much exposed area it has. Develop fluency in finding the surface area of a rectangular prism, a 3-dimensional shape with six faces. Rectangle area is ALWAYS: #color(red)'width'#xx#color(red)'height'# Surface Area of a Rectangular Prism Worksheets. There are many different formulas to find the areas of different shapes.

Surface area of rectangle