1. Find the circumference of each circle. Give your answers in terms of ..
(a) diameter = 9 cm (b) diameter 87 mm (c) radius = 18 cm
(d) radius = 39 m
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Step-by-step explanation:
circumference if radius is given =2πr
circumference if diameter is given=πd
π =22/7 or 3.14 ans will be same
a. 22/7×9
= 28.2857
b. 22/7×87
= 273.42
c. 2×3.14×18
=36×3.14
= 113.04
d. 2×22/7×39
=78×22/7
= 245.142
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