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OpenStudy (snowflake590):
The perimeter of this shape is 108.5 in. What is the length of side d? in. Polygon 21.5 in by 32.4 in by 28.7 in by variable d - assessment graphic
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563blackghost (563blackghost):
You are given 3 of the 4 sides in the shape. You want to know the 4th unknown side so since you are also given the perimeter which is the total of the 4 sides you would subtract it with your known sides... \(\huge\bf{108.5-(21.5+32.4+28.7)=x}\)
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