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70. The circumference of a circle whose diameter is 1 is very nearly 3.1416; show that for any other diameter d, the circumference is d x 3:1416.

71. The area of a circle whose diameter is 1 is very nearly 0.7854; show that for any other diameter the area is d' x 0.7854.

THE END.

London : Printed by W. CLOWES and Sons, Stamford Street.

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