Saturday, March 30, 2013

How do we find surface area and lateral area of prisms?

Surface Area and Lateral Area of a prism

A prism is a solid with bases that are 2 congruent polygons. The other sides of the prism are called the lateral faces. 
 Lets say that the height is 5, the base is 4 is the base, and 3 is the width. to find SA you would have to follow the formula SA= LA+2b. LA stands for lateral area, while 2b stands for the two times the are of the base. So while finding the surface area you also find the lateral area. 

To find Lateral Area you do the formula : LA= ph, p standing for perimeter and h standing for height.

So lets find the Lateral Area:
LA= ph
LA= (5*4)*2+(5*3)*2
LA=70

2b= 24

SA= 70+24= 94cm^2



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