The radius of a circle is 21 cm. Find the length of arc of this circle , if the length of the chord of the arc is 21 cm
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Step-by-step explanation:
(i) Length of the arc =360θ×2πr
=36060×2×722×21
=22cm [Ref. image (i)]
(ii) Area =360θπr2
=16060×722×21×21
=231cm2
(iii) Area of sector APB=ΔOAPB−ΔOAB
find Δ of AOB [Ref. image (iii)]
OM=π×cos30
=21×23
Area of ΔAOB=21×Base×height
=21×21×23×21
=34413
Area of segment =
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