Q8 of 52 Page 154

In figure 7.33 O is the centre of the sector.∠ ROQ = ∠ MON = 60°. OR = 7 cm, and OM = 21 cm. Find the lengths of arc RXQ and arc MYN.

Let the ∠ ROQ= ∠ MON = θ = 60°

As we know that,





⇒ Length(RXQ) = 7.6 cm


Similarly,



⇒ Length (MYN) = 22 cm


More from this chapter

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6

In the figure 7.31, radius of the circle is 7 cm and m(arc MBN) = 60°,find


(1) Area of circle


(2) A(O – MBN)


(3) A(O - MCN)

 7

In figure 7.32, radius of circle is 3.4 cm and perimeter of sector P-ABC is 12.8 cm. Find A (P-ABC).

 9

In figure 7.34, if A(P-ABC) = 154 cm2radius of the circle is 14cm, find

(1) ∠ APC.


(2) l (arc ABC).


 10

Radius of a sector of a circle is 7 cm. If measure of arc of the sector is –

(l) 30°


(ll) 210°


(lll) three right angles


Find the area of sector in each case.