# Maths

The arc of a circle of radius 20cm subtends an angle of 120degree at the center.use the value 3.142 for pie to calculate the area of the sector correct to the nearest cmsquared

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1. area of whole circle = Pi(20)^2
= 400Pi

Using a simple ratio:

A/400Pi = 120/360
A = 400Pi/3 cm^2
= ....

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posted by Reiny
2. NO

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posted by sesugh
3. A sector of a circle with radius 20cm has an area of 396cm2.calculate correct to 1decimal place the i.sectoral angle

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