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Answer:
Perimeter of equilateral triangle=3a
3x72
=216 cm
perimeter of triangle=perimeter of square
216=4a
=54 cm
Therefore, side of square is 54cm.
Hope it helps<3
Step-by-step explanation:
Length of one side of equilateral triangle = 72 cm
Perimeter = Side × 3
= 72 cm × 3
= 216 cm
Perimeter of square = 216 cm
One side of square = Area ÷ 4
= 216 cm ÷ 4
= 54 cm