Example: rectangle 8 m by 5 m has area 40 m²
Multiply 8 m by 5 m, keep the squared unit, and verify useful exact conversions.
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Area examples with exact formulas
Follow an 8 m by 5 m rectangle and a circle of radius 3 m through formula, exact result, approximation, and scope checks.
Example: circle radius 3 m has area 9π m²
Square radius 3, preserve the exact coefficient of pi, and compare the decimal approximation.
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