1.

the circumference of the circles, given that:(a) radius 21 mml. Find the circ(b) diameter 14 cm

Answer»

1. circumference = 2pir

a) 2pir = 2× 3.14 × 21 mm = 131.88mm

b) r = d/2 = 14 cm/2 = 7

2pir = 2× 22/7 × 7 = 44cm



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