posted by Joel .
Two sides of a triangle have the same length. The third side measures 4 meters less than twice the common length . The perimeter of the triangle is 16 meters. What are the lengths of the three sides?
a-lenght of two sides of triangle
c- lenght of third side of triangle
P=a+a+c= 2a+(2a-4)= 2a+2a-4= = 4a-4
4(a-1)=16 Divided with 4
c=2a-4 = 2*5-4 = 10-4= 6
Perimeter=a+a+c=5+5+6=10+6= 16 meters