Mathematics for IGCSE & O level - Mensuration (Section 11 - No. 8)
What is the approximate circumference of a circle with a radius of 14cm?
44 cm
88 cm
176 cm
616 cm
解释
Circumference = 2 * pi * r = 2 * (22/7) * 14 = 88. Therefore the approximate circumference is 88cm.