**click on the images to enlarge**

__How to find the Total Surface Area of a Rectangular Prism:__

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Method 1:

Step 1: Find the areas of all the rectangles, FRONT, SIDE, and TOP.

- Finding the area of the TOP rectangle:

l = 5m

w = 10 m

l x w = area

5 x 10 = area

50m

^{2}= area

- Finding the area of the FRONT rectangle:

l = 6m

w= 10m

l x w = area

6 x 10 = area

60m

^{2}= area

- Finding the area of the SIDE rectangle:

l = 6m

w= 5m

l x w = area

6 x 5 = area

30m

^{2}= area

Step 2: After you've found the area of the three rectangles you add them all up together:

50m

^{2}+60m^{2}+30m^{2}= 140m^{2}

Step 3: After you've added all three sides you need to multiply the answer by 2:

140m

280m

140m

^{2}x 2 =SA280m

^{2 }= SA

__METHOD 2:__**Step 1:**Draw the NET of the rectangular Prism.

**Step 2:**Find the Area of the Lateral area:

To do this you need to....

Find the

*length*by adding up the lengths of the rectangles:
6 + 5 + 6 + 5 = 22 m

l x w = LA

22 x 10 = LA

**220m**

^{2}= LA**Step 3:**Find the area of the other 2 identical rectangles:

l x w = a

6 x 5 = a

**30m**

^{2}= a

**Step 4:**Add up all the areas:

SA= LA+2(l x w)

SA= 220+2(5 x 6)

SA= 220+2(30)

SA= 220+60

SA=280m

^{2 }

__How to find the Total Surface Area of__*Triangular Prisms*:^{}

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__How to find the Total Surface Area of__*Cylinder*:

**Here are some links that***will*help you get more practice:
Here's also a video:

__Don't forget to play the__*new*Manga High Challenges!:__Finding the Volume of a Rectangular Prism:__

__Finding the Volume of a Cylinder:__

__Finding the Volume of a Triangular Prism:__**:**

__Here are some games that will enable you onto practicing on finding the volume of a shape__
How simple do you think you can solve "A small terrace at a football ground comprises of 15 steps each of which is 50 m long and built of solid concrete. Each step has a rise of 1/4 m and a tread of 1/2 m. Calculate the total volume of concrete required to build the terrace. http://youtu.be/w8YLSavbgNM

ReplyDeleteMensuration is a very important topic of mathematics as it is very much related to our daily life like area and volume of different solid figures or area of plot,length and breadth of different object.It is interlinked with many real life problems.

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