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Mathematics 18 Online
OpenStudy (anonymous):

Find the lateral area for the regular pyramid. the lateral area for the regular pyramid. the lateral area for the regular pyramid. http://media01.switchedononline.com/a_matgeo_2010/7/groupi76.gif

OpenStudy (pfenn1):

I assume by lateral area that you are looking for the areas of the pyramid without it's base. You need to calculate the area of the three sides and add them up.

OpenStudy (pfenn1):

|dw:1339200108190:dw|Can you calculate x?

OpenStudy (anonymous):

i am not sure exactly

OpenStudy (anonymous):

would it be 6

OpenStudy (anonymous):

6 square root of 3

OpenStudy (pfenn1):

Using the Pythagorean theorem, \[10^2=6^2+x^2\]Solve for x.

OpenStudy (anonymous):

okay so it would be 100 = 36 plus what

OpenStudy (pfenn1):

Rearranging the equation\[100-36=x^2\]\[x^2=64\]x=8

OpenStudy (pfenn1):

Now, you use the equation for the area of a triangle\[A=\frac 12bh\] where b is the base length and h is the height

OpenStudy (pfenn1):

A times 3 because there are 3 triangles.

OpenStudy (anonymous):

mine is all 4's like that

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