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# How do you find the area of an irregular rectangle or parallelogram?

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• Stitch85 May 11, 2010

For a parallelogram area equals the base times the height becase both sides ar parallel and have have the same angles. A= B*H For the irregular rectangle, it depends on how much information is given. Normally you can break the figure into rectangles and triangles and them add the areas together.

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Hello,
There is no such thing as an irregular rectangle. This being said, I believe that the area of a parallelogram is still equal to the product of the base by the height.
Draw your parallelogram with one side horizontal. From the next corner, draw a line perpendicular to the base. The length of the segment you just drew is h. If b is the length of the base the area is b*h.
Hope it helps.

Posted on Oct 11, 2009

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Posted on Jan 02, 2017

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## Related Questions:

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### Area of a Triangle - Math Goodies

www.mathgoodies.com/lessons/vol1/area_triangle.html To find the area of a triangle, multiply the base by the height, and then divide by 2. The division by 2 comes from the fact that a parallelogram can be divided into 2 triangles. For example, in the diagram to the left, the area of each triangle is equal to one-half the area of the parallelogram.

Work out the area of the green triangle, and subtract the area of the white triangle.

Google

Mar 30, 2017 | The Computers & Internet

1 Answer

### What would the area of the rhombus be

I don't think you can figure out the area of this rhombus/parallelogram.

The area of a parallelogram is base, which we have, times height.

Picture the parallelogram with all the angles being 90 degrees. The area would be 54 square centimetres. Now imagine you can slide the top part of the parallelogram to the right, with the bottom fixed and all the corners on hinges. In theory, you can nearly slide the top down until it is just above the base. The area would approach zero, as the height of the parallelogram decreases.

Good luck,

Paul

Apr 14, 2016 | Office Equipment & Supplies

1 Answer

### What is a parallelogram could you give me a shape please or a example or maybe directions or what a shape it is...

Take a square or a rectangle and push the top to one side . That is a parallelogram. But so are the square and the rectangle.

Mar 27, 2015 | Microwave Ovens

1 Answer

### What is the math definition for area?

Area - The size of a surface

Specific

Square
Area = Side x Side

Rectangle
Area = Length x Width

Triangle
Area = Base x Height (cut the answer in half and that is your area)

Parallelogram
Area = Base x Height

Circle
Area = Radius x Radius x 3.14

Aug 30, 2011 | Computers & Internet

1 Answer

### What are the different formula in solving the area, height, base of a trapezoid?

o find the area of a triangle, multiply the base by the height, and then divide by 2. The division by 2 comes from the fact that aparallelogram can be divided into 2 triangles. For example, in the diagram to the left, the area of each triangle is equal to one-half the area of the parallelogram.
Since the area of a parallelogram is , the area of a triangle must be one-half the area of a parallelogram. Thus, the formula for the area of a triangle is: or where is the base, is the height and · means multiply. The base and height of a triangle must be perpendicular to each other. In each of the examples below, the base is a side of the triangle. However, depending on the triangle, the height may or may not be a side of the triangle. For example, in the right triangle in Example 2, the height is a side of the triangle since it is perpendicular to the base. In the triangles in Examples 1 and 3, the lateral sides are not perpendicular to the base, so a dotted line is drawn to represent the height.

May 13, 2011 | Computers & Internet

2 Answers

### I have a lot tha is 152.95' X 119.88' X 130.00' X 50.00'. What part of an acre is this.

Hello,
1. This lot does not have the form or a regular quadrilateral (rectangle, square, parallelogram, etc.)
2. So you cannot calculate its area, you have to know exactly the shape it has.
3. With polygons, one usually cuts them into triangles.
4. You have to cut it into two triangles,
5. measure the base and the height of each triangle,
6. use the area formula for the triangle ( area = heightX base/2)
7. After you calculate the areas of both triangles, you add them to get the area of the the whole lot in ft^2.
8. Using the conversion formula between acres and ft^2 which is 1 acre=43560 ft^2, you divide the area of the lot in square feet by the number 43560 ft^2 and express the result as a percentage or a fraction .
Hope it helps.
Thanks for using FixYa.

Nov 19, 2009 | Calculated Industries Pocket Real Estate...

1 Answer

### How do i find area of a rectangle that has 1 straight side and the other is a triangle its irregular plz keep it simple / -------------I /-------------I

You shape is a rectangle and a right angled triangle. You need to divide it into the rectangle and the right angled triangle and add the areas.
Area of a rectangle is length * width

Then just add the two together.

Oct 08, 2009 | The Learning Company Achieve! Math &...

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