find the area off the sector of circle with radius 4 cm and the angle 30° the find the area of corresponding major sector?
ans. We have,
Let the radius of circle r=4cm.
Angle θ=30
o
Area of sector of circle
=
360
o
θ
×πr
2
=
360
o
30
o
×π×4×4
=
12
π
×16
=
3
4π
=
3
4
×3.14
=4.186cm
2
Area of major sector = Area of circle-area of minor sector
=πr
2
−4.186
=3.14×4×4−4.186
=3.14×16−4.186
=50.24cm.
2
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