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OpenStudy (darkworld131):
Diagonal DB divides ABCD into two equilateral triangles. The area of ABCD is____ square cm. (use 1.7 as the value of the square root of 3)
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jhonyy9 (jhonyy9):
so the lenght of AC =10 ?
jhonyy9 (jhonyy9):
the diagonal DB where is ?
jhonyy9 (jhonyy9):
because DB is a dide
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