Question

find the area of the sector of a circle with radius 4 cm and of angle 30 degree used by is equal to ​

Answer 1

Answer:

2.094 cm²

Step-by-step explanation:

My way is a liitle different.

Look a circle is of 360° therefore 30°is 1/12 th part of circle.

Since, area of circle=2πr

= 2 x 3.14 x 4 cm

= 25.132 cm

and the area of sector with 30° is

= (1/12) x 25.132

=25.132/12

= 2.094 cm²

Answer 2

Answer:

Area of sector = (@/360)[πr²]

= (30/360[π*4²]

= 16π/12

= 4π/3

= 4*22/7*3

= 88/21

= 4(4/21)cm²

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