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Pranav Satti

Sep 1, 2014

#### In an equilateral Δ ABC, the side BC is trisected at D. Prove that 9AD2 = 7AB2



In this solution triangle ABC and ACE is taken in place of ABC, ABE should be taken.

Swetcha

Aug 9, 2013

#### D,E,F are respectively th mid-points of the sides AB,BC and CA of ΔABC. Find the ratios of the area of ΔDEF and ΔABC.



Vaishali mathur Mathur

Aug 18, 2013



Tonykuttan

Aug 27, 2014



Harshit

Aug 7, 2013



Apr 14, 2015



Gajaanan Muley

Aug 10, 2013

#### AD is an altitude of an equilateral triangle ABC. On AD as a base,another equilateral triangle ADE is constructed.Prove that area(ADE):area(ABC)=3:4.



Nitin Rajda Rajda

Sep 23, 2013



Rohit

Sep 6, 2014



Malavika Ramesh

Sep 18, 2014



Pranav Satti

Sep 1, 2014

#### In an equilateral Δ ABC, the side BC is trisected at D. Prove that 9AD2 = 7AB2



In this solution triangle ABC and ACE is taken in place of ABC, ABE should be taken.

Swetcha

Aug 9, 2013

#### D,E,F are respectively th mid-points of the sides AB,BC and CA of ΔABC. Find the ratios of the area of ΔDEF and ΔABC.



Vaishali mathur Mathur

Aug 18, 2013



Tonykuttan

Aug 27, 2014



Harshit

Aug 7, 2013



Apr 14, 2015



Gajaanan Muley

Aug 10, 2013

#### AD is an altitude of an equilateral triangle ABC. On AD as a base,another equilateral triangle ADE is constructed.Prove that area(ADE):area(ABC)=3:4.



Nitin Rajda Rajda

Sep 23, 2013



Rohit

Sep 6, 2014