mrs. Burns is making cookies. The recipe calls for three 1/2 cups of flour and three 1/4 cup of sugar. if she wants to double th
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Remember that perimeter is the sum of the lengths of the sides. The way to find the length of the sides is 
where 
is one endpoint of one line, while 
is the other endpoint of the same line. Repeat this formula for each side and add them all together to get your perimeter