Question

Determine total surface area of a wall ​

Answer 1

Answer:

Walls. To calculate the area of a wall, use the standard formula of (Length) x (Width) = Area. Next, use the same formula to record the individual area of windows and doors. Once you have all of these measurements down, subtract the area of the windows and doors from the total area of the wall.

Answer 2

Answer:

Rectangular Walls

Step 1

Measure the vertical height and horizontal width of the wall.

Step 2

Multiply width and height measurements.

Step 3

Calculate the areas for doors and windows, if any. Subtract that amount from your overall measurements to determine the actual wall surface area.

Walls with Triangular Shapes

Step 1

Calculate any rectangular area and write down the result.

Step 2

Locate the triangular shape. Measure the width along its base and the height from the base to the highest point.

Step 3

Multiply the base and height measurements then divide the result by 2. Add this to the result you recorded in Step 1.

Step 4

Calculate the areas for doors and windows, if any. Subtract that amount from your overall measurements to determine the actual wall surface area.

Walls with Trapezoidal Shapes

Step 1

Calculate any rectangular area and write down the result.

Step 2

Measure the width of the bottom, the width of the top and the height. Write these numbers down.

Step 3

Add the width measurements together and divide by 2. Multiply this number by the height measurement. Add this result to solution in Step 1.

Step 4

Calculate the areas for doors and windows, if any. Subtract that amount from your overall measurements to determine the actual wall surface area.

Walls with Circular Shapes

Step 1

Calculate any rectangular area and write down the result.

Step 2

Measure from the middle of the circle to the edge, which is known as the radius.

Step 3

Multiply the measurement of the radius by itself, which is also known as squaring.

Step 4

Multiply the result of squaring the radius by 3.14.

Step 5

Divide the result in step 4 by 2, because you most likely need the area of only a portion a circle. Add this result to the area that you calculated in Step 1.

Step 6

Calculate the areas for doors and windows, if any. Subtract that amount from your overall measurements to determine the actual wall surface area.