Posted by Shruti katiyar on Wednesday, December 26, 2012 at 9:23am.
AB is a chord with centre O and radius 4 cm. AB is of length 4 cm and divides the circle into two segments. Find d area of minor segment.
A chord PQ of length 12cm suntends an angle of 120 degree at the centre of a circle. Find the area of minor segment cut off by the chord PQ

Maths  Steve, Wednesday, December 26, 2012 at 10:47am
area of segment is
a = 1/2 r^2 (θsinθ)
here,
4 sin θ/2 = 2, so θ=π/3
so,
a = 1/2 (16) (π/3  √3/2)
= 4/3 (2π3√3)
use same formula with θ=2π/3, r*sin(θ/2)=6 to find r

Maths  Dixita, Monday, February 29, 2016 at 11:31am
12.56
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