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Mathematics 17 Online
OpenStudy (anonymous):

Find the lateral area of the regular pyramid

OpenStudy (anonymous):

Directrix (directrix):

Lateral Area of a regular pyramid: ½ perimeter of the base × slant height. The perimeter of the base is easy to get because it is 3 times 4 because we know the base is an equilateral triangle.

Directrix (directrix):

The slant height is the length of the altitude of any one of the equilateral triangles. So, first up, do you know the 30-60-90 theorem or the Pythagorean Theorem?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

\[a ^{2}+b ^{2}=c ^{2}\]

OpenStudy (anonymous):

is it \[36\sqrt{3}\]

OpenStudy (anonymous):

@Directrix

Directrix (directrix):

For the slant height, I got 2 times square root of 3. |dw:1376962088531:dw|

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