Area of Rectangle Example

Grades 4-5Key Stage 2Årskurs 4-5

Problem

Find the area of a rectangle with length 12 cm and width 7 cm.

📝Step-by-Step Solution

Recall the formula

The area of a rectangle equals length times width.

Area = length × width (A = l × w)

Identify the dimensions

Length (l) = 12 cm, Width (w) = 7 cm

Substitute into the formula

A = 12 × 7

Calculate

A = 84

12 × 7 = 84

Add the units

Area is measured in square units. Since we used cm, the area is 84 cm².

A = 84 cm²

✅Final Answer

84 cm²

Area measures the space inside a 2D shape. For rectangles, multiply length by width. Always use square units (cm², m², in², ft²) for area. Remember: Area is NOT the same as perimeter (which is 2l + 2w = 2(12) + 2(7) = 38 cm for this rectangle).

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This worked example is part of the broader area formulas guide. Review the method, practice related skills, and create a printable assessment when you are ready.

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📖More Area Formulas Examples

Area of Triangle Example

Find the area of a triangle with base 10 m and height 6 m.

Easy

Back to Area Formulas Guide

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