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OpenStudy (rizags):
Equilateral Triangle DEF is inscribed in Equilateral triangle ABC with DE perpendicular to BC, as shown. What is the ratio of the area of triangle DEF to the area of triangle ABC?
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OpenStudy (rizags):
|dw:1414715681598:dw|
OpenStudy (rizags):
both equilateral
OpenStudy (rizags):
there should be a right angle at angle EDC and EDB
OpenStudy (mathstudent55):
|dw:1414715782037:dw|
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