Question

#5 The MAC is 4 centimeters. Find the circumference of B. Round your answer to the hundredths.

Answer 1

C ≈ 11.71 cm

Explanation:

using the ratio arc AC : circumference C = angle at centre of sector : 360°

`(AC)/(C)` =
`(123)/(360)` , that is

`(4)/(C)` =
`(123)/(360)` ( cross- multiply )

123 × C = 4 × 360 = 1440 ( divide both sides by 123 )

C =
`(1440)/(123)` ≈ 11.71 cm ( to the nearest hundredth )