### Home > CC1 > Chapter 3 > Lesson 3.2.3 > Problem3-121

3-121.

A triangular flower bed (space for planting flowers) needs a thin metal border all the way around it. The sides are $7$ feet, $6$ feet, and $9$ feet long.

1. How many feet of border should be purchased? Make a sketch and show your work.

• This problem is asking you to find the perimeter (distance around) the flower bed.

• In order to cover the perimeter, $22$ feet of border should be purchased.

Begin by sketching a picture of the flower bed with labels.

Add the lengths of the sides to find the perimeter.

$7 \text{ feet} + 6 \text{ feet} + 9 \text{ feet} = 22 \text{ feet}$

1. If borders cost $8.75$ per yard (and only whole numbers of yards can be purchased), how much would the border cost?

• Remember to convert the length of border to yards before finding the cost.