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Finding Area for 2-D Shapes

Page history last edited by PBworks 16 years, 5 months ago

Finding Area for 2-D Shapes!

 

 

What is area?

 

          Area is the amount of space in a figure. In this case, it's for 2-D shapes.

 

What are 2-D Shapes?

 

          2-D = 2-Dimensional. A 2-D shape is a closed, flat figure.

 

 

         For Example: A quadrilateral, triangle, circle, parallelogram, and a lot more :)

 

                                        

 

 

Area of a Square...

 

To find the area of a square, just multiply with this formula: Length squared or Length times Width.

 

 

                 L²   or  L xW                                                 L                                                     EX: 5x5=25 units squared 

                                                                                                                                

 

 

 

 

Area of a Rectangle...

 

To find the area of a retangle, multiply its Length to its Width. 

 

 

                           L xW                                                              Ex:10x5=50 units squared

                                                                           

                                                                                                   

 

Area of a Triangle... 

 

To find the area of a triangle, multiply half the base times the height.

 

               1/2bxh                                                                  Ex:1/2(12) x (8)

 

                                                                                                                                                                                                           6  x  8= 48 inches squared

 

 

 

 

                                                                                                                                                                    

 

 

 

 

 

Area of a Parallelogram...

 

To find the area of a parallelogram, multiply with its base tmes its height.

 

              BxH                                                                      Ex: 12x5=60 centemeters squared

 

 

                                                                                                      

 

 

 

 

 

Area of a Circle...

 

To find the area of a circle, multiply pi(3.14) with the circle's radius and the radius again.

 

             r²                                                                                                                     Ex: (3.14)(5)(5)=78.5 inches squared

 

 

 

 

                                                                                                                                                                   

 

 

 

 

 

 

 

 

More...

 

For more information about area and anything else about math, visit

 

the following websites:

 

 

http://mathgoodies.com/students.html

 

 

 

 

http://www.mathsisfun.com/area.html

 

 

 

 

To find surface area for 3-Dimensional shapes, visit Austin's page:

 

 

 

finding the surface area for 3D shapes

Comments (9)

Anonymous said

at 9:56 am on Nov 5, 2007

put examples like numbers on the picture to show how it works. its good tho :]

Anonymous said

at 10:10 am on Nov 5, 2007

you have good pictures but try to add links to your page

Anonymous said

at 2:30 pm on Nov 5, 2007

I agree with Adela, you should show examples of how you can find the area of something. Also, instead of using an asterisk for multiplication, you can use an "x". That's what I did anyway.

Anonymous said

at 2:54 pm on Nov 5, 2007

need some examples.

Anonymous said

at 4:53 pm on Nov 5, 2007

you need examples and to try to fix up your pictures
very good :)how do you want me to help you fiona??

Anonymous said

at 6:48 pm on Nov 5, 2007

nice put a few examples what kind of pics should i put on my page?

Anonymous said

at 7:26 pm on Nov 5, 2007

Good but give an example on how to multiply them and just put circles and other shapes

Anonymous said

at 7:30 pm on Nov 5, 2007

Thanks for the comment! I LOVE yours! It's so COLORFUL!!! Yay! And there's lots of pictures! I like that! Just in my opinion though, the color of your title doesn't quite match everything else...it's too light...I think...

Anonymous said

at 5:23 pm on Nov 21, 2007

Good, but this gets hard to read the farther from the top one gets. A little more time fixing your pictures would help.

3 of 4 points
11 of 12 total project points

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