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Linear & Area Measures

Linear Measure Area Measure Linear Metric Conversions
12 inches = 1 foot 144 sq. inches = 1 square foot .394 inch = 1 centimeter
3 feet = 1 yard 9 square feet = 1 square yard 1 inch = 2.54 cm.
5,280 feet = 1 mile 1 sq. yard = 1,296 sq. inches 1 foot or 12 inches = 30.48 cm. 
1 yard = 0.91 meter 43,560 sq. feet = 1 acre 1 yard or 3 feet = 91.44 cm
39.37 inches = 1 meter 640 acres = 1 square mile 3.281 feet = 100 cm. or 1 meter
1 mile = 1,609.34 meters 328 feet = 100 meters
.621 mile = 1000 meters or 1 km.
1 mile or 5,280 feet = 1.69 km.
Units of Area Conversion How to Measure Land Area
1 acre = .4047 hectares Area of a Square or Rectangle:
Formula : Length x Width
Example: 50’ x 100’ = 5000 sq. ft.
2.471 acres = 1 hectare
10 acres = 4.047 hectare Area of Triangle:
Formula: .5 x base x height
Example: .5 x 50’ x 100’ = 25 x 100 = 2500 sq. ft.
.381 sq miles or 247 acres =
100 hectares or 1 sq. kilometer
1 square mile = 259 hectares Area of Circle :
Formula: A = π x radius²
Example: A = 3.14 x 25ft.x 25ft. = 1962.5 sq. ft.
1 square kilometer = 100 hectares