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प्रश्न
If he area of a sector of a circle is \[\frac{7}{20}\] of the area of the circle, then the sector angle is equal to
विकल्प
110°
130°
100°
126°
उत्तर
We have given that area of the sector is `7/20`
of the area of the circle.
Therefore, area of the sector =` 7/20xx` area of the circle
`∴ θ/360xxpir^2=7/20xxpir^2`
Now we will simplify the equation as below,
`θ/360=7/20`
Now we will multiply both sides of the equation by 360,
`∴ θ=7/20xx360`
Therefore, sector angle is `126°`
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