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In the Given Figure, Radius of Circle is 3.4 Cm and Perimeter of Sector P-abc is 12.8 Cm . Find A(P-abc). - Geometry

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Question

In the given figure, radius of circle is 3.4 cm and perimeter of sector P-ABC is 12.8 cm . Find A(P-ABC). 

Solution

Radius of the circle, r = 3.4 cm
Perimeter of sector P-ABC = 12.8 cm
Let l be the length of the arc ABC. 
∴ l + 2r = 12.8 cm
⇒ l + 2 × 3.4 = 12.8
⇒ l = 12.8 − 6.8 = 6 cm
∴ A(P-ABC) = Area of the sector PABC = \[\frac{1}{2}lr = \frac{1}{2} \times 6 \times 3 . 4\]  = 10.2 cm2
Thus, A(P-ABC) is 10.2 cm2.

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APPEARS IN

 Balbharati Solution for Balbharati Class 10 Mathematics 2 Geometry (2018 to Current)
Chapter 7: Mensuration
Practice set 7.3 | Q: 7 | Page no. 155
Solution In the Given Figure, Radius of Circle is 3.4 Cm and Perimeter of Sector P-abc is 12.8 Cm . Find A(P-abc). Concept: Perimeter and Area of a Circle.
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