Question

find the perimeter of a triangle if
one side is ll centimetres, another
side is one fifth the perimeter.add
the third side is one fourth the
perimeter​

Answer 1

Answer:

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Answer 2

Answer:

Step-by-step explanation:

Let the triangle be ABC

Let the perimeter be "x"

So,

AB=11

BC=1/5x

AC=1/4x

AB+BC+AC=Perimeter

=>  11+x/5+x/4=x

=>  x/5+x/4=x-11

=>  (4x+5x)/20=x-11     (Taking LCM)

=>  9x=20(x-11)

=>  9x=20x-220

=>  -11x= -220

=>    x=20cm