Podcast
Questions and Answers
What is the formula for calculating the perimeter of a square?
What is the formula for calculating the perimeter of a square?
- 4 * side length (correct)
- 2 * (length + width)
- side length * side length
- (length + width) / 2
If a square has a perimeter of 20 units, what is the length of each side?
If a square has a perimeter of 20 units, what is the length of each side?
- 4 units
- 8 units
- 10 units
- 5 units (correct)
How does the perimeter of a rectangle change if its length is doubled and width remains the same?
How does the perimeter of a rectangle change if its length is doubled and width remains the same?
- Halves
- Doubles
- Remains the same (correct)
- Increases by the sum of length and width
What is the formula for calculating the perimeter of a square?
What is the formula for calculating the perimeter of a square?
If a rectangle has a length of 6 units and a width of 4 units, what is its perimeter?
If a rectangle has a length of 6 units and a width of 4 units, what is its perimeter?
If the perimeter of a square is 40 units, what is the length of each side?
If the perimeter of a square is 40 units, what is the length of each side?
Flashcards
Perimeter of a square formula
Perimeter of a square formula
Multiply the side length by 4
Perimeter of square (20 units)
Perimeter of square (20 units)
Each side is 5 units long
Rectangle length doubled
Rectangle length doubled
Perimeter stays the same (width constant)
Perimeter of a square formula (again)
Perimeter of a square formula (again)
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Rectangle (length 6, width 4)
Rectangle (length 6, width 4)
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Square with perimeter 40
Square with perimeter 40
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Study Notes
Perimeter of a Square
- The formula to calculate the perimeter of a square is P = 4s, where P is the perimeter and s is the length of one side.
- For a square with a perimeter of 20 units, each side length can be found by rearranging the formula: s = P/4, which results in s = 20/4 = 5 units.
- If the perimeter of a square is 40 units, the side length is calculated similarly: s = 40/4 = 10 units.
Perimeter of a Rectangle
- The perimeter of a rectangle is calculated using the formula P = 2(l + w), where P is the perimeter, l is the length, and w is the width.
- If the length of a rectangle is doubled while the width remains constant, the new perimeter is calculated as follows:
- Original perimeter: P = 2(l + w)
- New perimeter after doubling the length: P' = 2(2l + w) = 4l + 2w, indicating an increase in perimeter.
- For a rectangle with a length of 6 units and a width of 4 units, the perimeter is P = 2(6 + 4) = 2(10) = 20 units.
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