Emma wants to put a lace ribbon around the edge of a rectangular table. The table has a length of 12 cm and a width of 8 cm.How many centimeters of ribbon does Emma need in total?
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Step-by-Step Solution
Step 1: Identify the shape and required measurement
The problem asks for the total length of ribbon needed to go around the edge of a rectangular table. This means we need to find the perimeter of the rectangle.
Step 2: Recall the formula for the perimeter of a rectangle
The formula for the perimeter (P) of a rectangle is twice the sum of its length (l) and width (w).
Step 3: Substitute the given values into the formula
We are given the length l=12 cm and the width w=8 cm. Substitute these values into the perimeter formula.
Step 4: Calculate the perimeter
First, add the length and width: 12 cm+8 cm=20 cm. Then, multiply the sum by 2 to get the total perimeter, which is 40 cm.