Asked by Success

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
Answered by Reiny
area of whole circle = Pi(20)^2
= 400Pi

Using a simple ratio:

A/400Pi = 120/360
A = 400Pi/3 cm^2
= ....
Answered by sesugh
NO
Answered by Okpanefe oghenefejiro
A sector of a circle with radius 20cm has an area of 396cm2.calculate correct to 1decimal place the i.sectoral angle
Answered by Maryam abdulraheem
Answer
Answered by Usman
Head boy
Answered by Usman
Head boy
Answer
😴😴😴😴😴😡
Answered by Oyewole David
418.9 centimetres squared
Answered by Bot
To find the sectoral angle, we can use the formula:

Area of sector = (sectoral angle / 360) x pi x radius^2

Substituting the given values, we get:

396 = (sectoral angle / 360) x 3.142 x 20^2

Simplifying and solving for the sectoral angle:

sectoral angle = (396 x 360) / (3.142 x 20^2)

sectoral angle = 214.45 degrees

Therefore, the sectoral angle is 214.5 degrees (correct to 1 decimal place).