D E F ARE MIDPIONTS OF BC CA AND AB OF TRIANGLE ABC SHOW AREA BDEF=1/2AREA ABC
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if equalateral triangle
ABC=√3/4 a^2
BDEF= D1*D2/2
D1=1/2a
D2=√3/2 a
AREA OF BDEF = √3/8 a^2
it's equal to 1/2 ABC
ABC=√3/4 a^2
BDEF= D1*D2/2
D1=1/2a
D2=√3/2 a
AREA OF BDEF = √3/8 a^2
it's equal to 1/2 ABC
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