Perimeter and Area Flashcard

Front

What is the perimeter of a rectangle?

Back

The total length around (outside) of a rectangle, calculated by adding all the side lengths.

Front

How do you find the perimeter of a rectangle?

Back

Add the lengths of all four sides or use the formula: P = 2(length + width).

Front

What is area?

Back

The space within (inside) of a shape.

Front

How do you find the area of a rectangle?

Back

Multiply the length by the width: Area = length × width.

Front

What happens to the area if you double the width but keep the length the same?

Back

The area doubles.

Front

What is the break apart strategy?

Back

Breaking shapes into smaller rectangles to help find the area.

Front

If a rectangle has a length of 5 feet and a width of 3 feet, what is its area?

Back

15 square feet (Area = 5 × 3).

Front

If a rectangle has a length of 8 feet and a width of 2 feet, what is its perimeter?

Back

20 feet (Perimeter = 2(8 + 2)).

Front

What is the formula for finding the perimeter of a square?

Back

P = 4 × side length.

Front

If the side length of a square is 4 units, what is its perimeter?

Back

16 units (P = 4 × 4).