Lesson 9-2 Example 4

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Lesson 9-2 Example 4
9-2
Solve. GEOMETRY The perimeter of a trapezoid is
the sum of the length of its sides. One side
length is 16 inches. One side length is 7 inches.
Another side length is 25 inches. Write an
expression for the perimeter of the trapezoid.
Understand Read the problem. Write what you know.
The perimeter of a trapezoid is the sum of the
lengths of 4 sides. One side is 16 inches. One
side is 7 inches. One side is 25 inches.
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Lesson 9-2 Example 4
9-2
Plan Pick a strategy. One strategy is to draw a
diagram. Sketch the trapezoid. Choose a variable
for the length of the unknown side.
The operation to use is addition.
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Lesson 9-2 Example 4
9-2
Solve Write the expression for the perimeter.
16 7 25 x Simplify the expression. 48 x
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Lesson 9-2 Example 4
9-2
Check Does the expression make sense? The
perimeter of the trapezoid should be greater
than the length of the three known sides combined.