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Find the area of an equilateral triangle with apothem 7 cm.
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draw it out
remember, equilateral triangle is just a regular polygon. so apothem is simply the perpendicular distance from center to its sides
|dw:1376160893031:dw|
looks good :) now, the task is to find area of this triangle wat do we need to find area of triangle ?
|dw:1376161045928:dw|
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