Math Problem Statement
Without actually solving the problem, choose the correct solution by deciding which choice satisfies the given conditions. The length of a rectangle is 3 feet longer than the width. The perimeter is 18 feet. Find the dimensions of the rectangle.
Solution
Given that the length of the rectangle is 3 feet longer than the width, and the perimeter is 18 feet, let's determine which choice satisfies these conditions.
Let:
- The width of the rectangle be .
- The length of the rectangle be .
The perimeter of a rectangle is given by the formula: Substituting the expressions for length and width:
Now, we simplify the equation: Subtracting 6 from both sides: Dividing both sides by 4:
Thus, the width is 3 feet, and the length is feet.
The correct dimensions of the rectangle are:
- Width = 3 feet
- Length = 6 feet.
Would you like me to provide more details or answer any questions?
Relative Questions:
- How would the dimensions change if the perimeter was increased to 24 feet?
- What happens to the dimensions if the length is 5 feet longer than the width?
- How can we apply this method to other shapes with different perimeter formulas?
- How does the formula for perimeter change if the shape was a square?
- What would the area of this rectangle be with the given dimensions?
Tip:
Always double-check that your values satisfy all conditions of the problem, like ensuring the perimeter equation holds after solving for dimensions.
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Math Problem Analysis
Mathematical Concepts
Geometry
Perimeter
Formulas
Perimeter of a rectangle: P = 2(l + w)
Theorems
-
Suitable Grade Level
Grades 5-7
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