document.write( "Question 1132721: An equilateral triangle has a side length of 4 ft. What is the area of the triangle? \n" ); document.write( "
Algebra.Com's Answer #749817 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! Draw this and the altitude is a perpendicular bisector of the base. \n" ); document.write( "that right triangle has base 2, alt h and an angle of 60 degrees \n" ); document.write( "sin 60=alt/4 \n" ); document.write( "sqrt(3)/2=alt/4 \n" ); document.write( "altitude is 2 sqrt(3) feet \n" ); document.write( "area is 1/2 bh=1/2*2sqrt(3)*4=4 sqrt(3) feet \n" ); document.write( "the general formula is s^2/4* sqrt(3) \n" ); document.write( " |