Use the Pythagorean Theorem to help you determine the area of an equilateral triangle with sides of length 1 unit. about 0.491 square units about 0.378 square units about 0.521 square units about 0.433 square units
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Draw an altitude from one vertex to the midpoint of the opposite side, dividing the triangle into two 30-60-90 right triangles. Show more…
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