Homework Help: linear system problems

Posted by madison on Monday, January 18, 2010 at 9:36pm.

the base of an isosceles triangle is one third the lenght of each congruent sides the perimeter of the triangle is 84 cm how long is the base?

linear system problems - Damon, Monday, January 18, 2010 at 9:54pm
If the base is x
each side is 3 x
the perimeter is x + 3 x + 3 x = 7 x
so
7 x = 84
x = 12

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