What will be the area of the rectangle whose sides are 12 m and 21 m?

Area of Rectangle Explanation

Area of a Rectangle with Sides 12 m and 21 m

The area is 252 m², found by multiplying the two side lengths 12 m × 21 m.

Formula

The area of a rectangle equals length times width: A = length × width, measured in square units such as m².

Calculation

• Given sides: length = 12 m, width = 21 m.
• Compute: A = 12 × 21 = 252.
• State units: 252 m².

Why this works

A rectangle can be partitioned into unit squares. Multiplying length by width counts how many 1 m by 1 m squares fit inside, which defines area. Equivalently, splitting along a diagonal gives two congruent right triangles, so A = 2 × (1/2 × base × height) = length × width.

Unit Check and Variants

• Always express area in square units matching the side units; meters by meters gives m².
• The same computation appears in worked examples for sides 12 m and 21 m, confirming 252 m².