ΔABC is an equilateral triangle in which D, E and F are the points on – McqOptions

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1.	ΔABC is an equilateral triangle in which D, E and F are the points on side BC, AC and AB, respectively, such that AD ⊥ BC, BE ⊥ AC and CF ⊥ AB, which of the following is true?
A.	2AB2 = 3AD2
B.	3AC2 = 4BE2
C.	7AB2 = – 9AD2
D.	4AC2 = 5BE2
Answer» C. 7AB2 = – 9AD2

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