Problem
Find the area of a rectangle with length 12 cm and width 7 cm.
📝Step-by-Step Solution
1
Recall the formula
The area of a rectangle equals length times width.
Area = length × width (A = l × w)
2
Identify the dimensions
Length (l) = 12 cm, Width (w) = 7 cm
3
Substitute into the formula
A = 12 × 7
A = 12 × 7
4
Calculate
A = 84
12 × 7 = 84
5
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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