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February 28, 2015

February 28, 2015

Posted by **i need help from anyone!** on Monday, March 25, 2013 at 2:10am.

- GEOMetry(TRIANGLE) -
**black_widow**, Monday, March 25, 2013 at 4:48amAB=50

- GEOMetry(TRIANGLE) -
**stranger**, Monday, March 25, 2013 at 5:02amhow

- GEOMetry(TRIANGLE) -
**black_widow**, Monday, March 25, 2013 at 5:24amLet length of AB =a

sABC=sABD+sACD (s stands for area)

1/2x60x(a^2-30^2)^0.5=1/2x(16a+32a)

5(a^2-30^2)^0.5=4a

25a^2-16a^2=25x30^2

a^2=2500

a=50

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