In a circle of radius a A the area of sector which makes an angle of B at the centre is
Answers
Answered by
0
Step-by-step explanation:
r=21cm
θ=150
o
Length of arc = 2πr×
360
θ
= 2×
7
22
×21×
360
150
= 55 cm
Area of sector = πr
2
×
360
θ
=
7
22
×21×21×
360
150
= 577.5cm
2
Answered by
1
Answer:
B/360* πA²
Step-by-step explanation:
Area of the sector = Bth part of area of whole circle
Therefore the formula becomes θ/360* πr²
where θ is the angle made by the sector at center and r is the radius of the circle.
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