An equilateral triangle and a square have equal perimetres.if side of the triangle is 9.6cm. what is the length of the side of the square?

Dear Student,
Perimeter of equilateral triangle= 3$\times$$\times$$\times$side
                                                  =3$\times$9.6= 28.8 cm
Perimeter of square= perimeter of equilateral triangle=28.8 cm
Now,  Perimeter of square= 4$\times$side
            28.8= 4$\times$side
$\frac{28.8}{4}$=side
Side of square is equal to 7.2 cm

Regards