Perimeter and Area of Composite 2-D Shapes

Time to do some revision and recall back what's we  have learnt about perimeter and area of composite

2-D shapes. You can watch this video clip below or  play a math game. The choice is yours!

                                                                                                              

                              

It's brain work out time now,  have fun!

         

Party Designer



Calculate The Area of Composite 2-D Shapes

The area of a composite 2-D shape can be found by finding the areas of individual shape and adding them up.

 Example :

     

     

                                                             

                                                 

                                Area = Length x Breadth       

                           

                                 

You can learn more about area of rectangle by clicking             this powerpoint presentation :  Area_of_rectangles_JB.ppt       

                Tired of learning? Play some games here, have fun!

                                             Perimeter and Area Games              

            

  

Area of Composite 2-D Shapes

Area is the amount of space contained inside a 2D shape.

If the shape is drawn accurately on squared paper, you

just need to count the amount of squares that are 

contained inside the shape. Simple as ABC, right?

Examples :

  

      

                                                         

Let's practise

Can you find the area of the composite shape below?

                                                                      2
Answer = (3x7) + ( 2x3) + (3x6)= 45cm


            Here is an interesting video clip to be watched, do enjoy it!        

Solve problems involving perimeters of composite 2-D shapes

Let's practise

 

1. Mei Eng  made a bookmark using a rectangle and a triangle. Find the perimeter of the bookmark.

 2. Can you find the perimeter  of the road signboard to your school? It was a composite shape of rectangle and a triangle.

                                       

3. Find the perimeter of this letter

      "T ". 

 

********************************************************************************************************************                                    1. (5 + 5 + 17 + 4 +17 ) cm = 48cm

 
          2. ( 42 + 3 + 12 + 12 + 3 + 42 + 8 ) cm = 122 cm 

  3. ( 10 + 2 + 4 + 12 + 2 + 12 + 4 + 2 ) cm = 48 cm

                                       ********************************************************************************************************************

 

                                             

                    You can work out some exercises from the website given: 

                  Quiz engine for perimeter                                                          

Treat yourself by making a bookmark.