Asked by Blinkz

A sector of a circle of radius 7cm subtends angle 270° at the centre. Calculate a. Length of arc b. Area of sector c. Perimeter of sector
Answered by oobleck
easy way: 270° is 3/4 of a circle, so the
arc is 3/4 * 2πr
area is 3/4 * πr^2

But, using the same logic, you have 270/360 * 2π = 3π/2, so
arc is rθ = 3 * 3π/2
area is 1/2 r^2 θ = 1/2 * 9 * 3π/2
perimeter = arc + 2 radii = 9π/4 + 2*3
Answered by Brandi
2x+14 radius 270_2=12
Answered by Brandi
BODMAS operation is allow in any equation try and use "bodmas" to solve equation. math is the simple work in life and everything in life contain caculation
Answered by Lekan
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Answered by Norman
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Answered by Aliameen
The Real answer
Answered by Favour
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Answered by Joy
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Answered by Bitrus HoLii
33
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