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Mathematics 21 Online
OpenStudy (anonymous):

Find the area of an equilateral triangle with sides of length 8.

OpenStudy (freckles):

equilateral means all the sides have equal lengths and if all the angles are also equal

OpenStudy (freckles):

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OpenStudy (freckles):

you already have the length of the base of this triangle

OpenStudy (freckles):

you just need the height

OpenStudy (freckles):

the height can be found by drawing a line that cuts the triangle in half and therefore bisecting the northern angle and bisecting the southern line segment

OpenStudy (freckles):

Then to find that height use the Pythagorean theorem

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