Praxis Core Academic Skills for Educators: Mathematics (5733)GeometryEasy
A landscaper is designing a rectangular garden plot that is 15 feet long and 8 feet wide. If they want to place a fence around the entire perimeter of the garden, how many feet of fencing will they need?
- A120 feet
- B60 feet
- C46 feet
- D23 feet
Show answer & explanationAnswer & explanation
Correct answer: C. 46 feet
The perimeter of a rectangle is calculated by adding the lengths of all four sides, or 2 * (length + width). For a garden 15 feet long and 8 feet wide, the perimeter is 2 * (15 + 8) = 2 * 23 = 46 feet.
Why the other options are wrong
- A. This is twice the area, not the perimeter.
- B. This is the area of the garden, not the perimeter.
- D. This is simply the sum of length and width, not the perimeter.
Perimeter of a Rectangle
The total distance around the outside of a rectangle.
- Calculated by adding all four side lengths.
- Formula: P = 2 * (length + width) or P = 2L + 2W.
- Units are linear (e.g., feet, meters).
Memory trick: Around the rectangle, path you make, two lengths and two widths for goodness sake!