Rectangle Calculator

Calculate rectangle properties from length and width measurements, including area, perimeter, and diagonal length using the Pythagorean theorem.

1. 1

   Step 1

   Enter the length of the rectangle (the longer side)

2. 2

   Step 2

   Enter the width of the rectangle (the shorter side)

3. 3

   Step 3

   The calculator computes the area by multiplying length by width

4. 4

   Step 4

   The perimeter is calculated by summing all four sides

5. 5

   Step 5

   The diagonal is calculated using the Pythagorean theorem

• 1

  A square is a special case of a rectangle where length equals width

• 2

  The diagonal divides the rectangle into two congruent right triangles

• 3

  Area is measured in square units (square meters, square feet)

• 4

  The two diagonals in a rectangle are equal and bisect each other

• 5

  Perimeter is the total distance around the rectangle

• Confusing area and perimeter in practical applications

• Forgetting to multiply the sum by 2 when calculating perimeter

• Using different units for length and width without conversion

• Confusing length and width in calculations