The base of an isosceles triangle is half the length of each of its congruent sides. If the perimeter of the triangle is 120 inches, what is the length of the base?
A.16 inches
B.6 inches
C.24 inches
D.12 inches

Question

The base of an isosceles triangle is half the length of each of its congruent sides. If the perimeter of the triangle is 120 inches, what is the length of the base?
A.16 inches 
B.6 inches   
C.24 inches
D.12 inches

anonymous · Answer

perimeter of the triangle = sum of three sides
in an isosceles triangle two sides are equal
there assume equal sides to be equal to 2x
as a result of this base would be x
hence perimeter = 2x+2x+x
120 = 2x+2x+x
hope u can solve now