Respuesta :

cookiemonstergirl

Answer:

12cm

Step-by-step explanation:

Let x be the leg of the given isosceles triangle.

Then, the base of isosceles triangle = x+7

Consider the perimeter of the isosceles triangle, we get

x+x+x+7=43

3x+7=43

3x=36

x=12

hope this helps

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