Area and Perimeter Missing Sides (4th Grade)

Front

What is the formula to calculate the perimeter of a rectangle?

Back

Perimeter = 2 × (length + width)

Front

If a rectangle has a length of 10 units and a width of 5 units, what is its perimeter?

Back

Perimeter = 2 × (10 + 5) = 30 units

Front

What is the area of a rectangle?

Back

Area = length × width

Front

If a rectangle has a length of 8 units and a width of 4 units, what is its area?

Back

Area = 8 × 4 = 32 square units

Front

What is the term for the distance around a shape?

Back

Perimeter

Front

What is the term for the space inside a shape?

Back

Area

Front

If the perimeter of a rectangle is 20 units and one side is 6 units, what is the length of the other side?

Back

7 units (Perimeter = 2 × (6 + x) = 20) => x = 7

Front

If the perimeter of a shape is 40 units and two sides are 10 units each, what is the total length of the other two sides?

Back

20 units (Perimeter = 40, so 40 - 10 - 10 = 20) => other two sides = 20 units

Front

If the perimeter is 28 units, what is the missing side length if the other side is 7 units?

Back

7 units (Perimeter = 2 × (7 + x) = 28) => x = 7

Front

If the perimeter of a rectangle is 26 units and one side is 4 units, what is the length of the other side?

Back

9 units (Perimeter = 2 × (4 + x) = 26) => x = 9