Posted by Anonymous on Friday, March 11, 2011 at 2:49pm.
We have a 17 by 20foot garden. We want to pour cement for a sidewalk 3 feet wide around the garden. To make the forms for the cement, we will need to buy some 2 by 4 inch lumber. How many feet of 2 by 4 inch lumber will we need just for the perimeter of the walk? (Consider both inside and outside perimeter.)

Geometry  MathMate, Saturday, March 12, 2011 at 10:04am
Perimeter = 2(width+length)
For garden,
width=17'
length=20'
perimeter(inside)=2(17+20)=74'
For outside of sidewalk,
width = 17+2*3'=23'
length= 20+2*3'=26'
perimeter(outside)=...
Can you calculate the outside perimeter and add up the two perimeters?

Geometry  Madz, Thursday, February 16, 2017 at 7:59pm
172
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