in an isosceles triangle the base is 11 less than 3 times the length of the leg if the perimeter is 39 centimeters then find the length of the base A. 14B.10C.19D.20
Question
Answer:
suppose the legs are x meters each, the base is 3x-11the perimenter: x+x+(3x-11)=39
5x=50
x=10
so the base is 3*10-11=19
the answer is C.
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