Q&A for How to Calculate Area of an Object

All shapes are different, but here is how to calculate cubes specifically: First you would need to have all of the dimensions (length, width, and height) of the cube. Then, you would multiply the dimensions and the formula would be l*w*h or length times width times height in word form.

In the case of a square, rectangle, or parallelogram, multiply length by width.

No, the area varies by shape. For all shapes of a given perimeter, the circle has the largest area.

For a rectangular prism, calculate the surface area by finding the area of its individual faces. Use the dimensions given to do length times width to calculate the area of the six different rectangles that make up a rectangular prism.

That formula would apply to a cube. The surface area of a cube is 6 e², or six times the square of the length of an edge.

Yes.

You would also have to know the length of at least one side. The perimeter alone is not enough information.

Unless the object is a regular pentagon, there is no relevant formula. The area of a regular pentagon is found by calculating half the product of the apothem and the perimeter.

Because "stars" come in various shapes, there is no specific formula for the area.

The total surface area of a cylinder is found by adding 2πr² (r is the radius) to the product of the circumference and the height or length of the cylinder. The volume is found by multiplying πr² by the height or length.

Determine the area (length X width) of each room, and add all the areas together.

Area is the amount of space on a surface within boundaries. Often people want to measure an area, because they want to know how much material is required to cover or otherwise deal with that area, such as paint on a wall, carpet on a floor, or grass seed for a lawn.

You have to know the length of one of the sides and the perpendicular distance from that side to its opposite vertex. (That distance is known as the triangle's "height" or "altitude.")

Calculating either the surface area or the volume of a car is too complicated to explain here.

If the area is defined by straight sides and right angles, you would multiply length by width. Otherwise, the process is more complicated. You would have to resolve the area into smaller subsections whose respective areas can be calculated through common formulas: squares, rectangles, triangles, trapezoids, sectors of circles, etc.