Look at the trapezoid in the figure.
Calculate its perimeter.
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Look at the trapezoid in the figure.
Calculate its perimeter.
To solve this problem, we'll follow these steps:
Now, let's work through each step:
Step 1: The problem gives us the lengths of the trapezoid's sides:
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-
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Step 2: We use the formula for the perimeter of a trapezoid:
Step 3: Plugging in the given values, we calculate:
Calculating further, we have:
Therefore, the perimeter of the trapezoid is .
24.2
Given the trapezoid:
What is the area?
A trapezoid has four sides, just like any quadrilateral! The perimeter is the total distance around the entire shape, so you must include every side to get the complete measurement.
Always align the decimal points vertically when adding. This ensures you're adding tenths to tenths, ones to ones, etc. For example:
2.5
10.4
5.3
+ 6.0
----
24.2
Treat whole numbers as decimals with zero in the tenths place! So 6 becomes 6.0 when adding with other decimal numbers. This makes alignment easier.
No! Addition is commutative, so you can add the sides in any order. However, it's good practice to go around the shape systematically to avoid missing any sides.
Look at your answer compared to the individual sides. The perimeter should be larger than any single side but not wildly different from what you'd expect by roughly adding them in your head.
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