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( r1 (r2+ r3))/( sqrt( r1r2+r2r3+ r1r3))...

` ( r_1 (r_2+ r_3))/( sqrt( r_1r_2+r_2r_3+ r_1r_3)) = `

A

` a`

B

` b`

C

` c`

D

`1`

Text Solution

Verified by Experts

The correct Answer is:
A
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - II
  1. In Delta ABC , the length of the altitude from A to BC is

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  2. In Delta ABC , if r1= 12 , r2 = 18 , r3 = 36 then the length of the al...

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  3. ( r1 (r2+ r3))/( sqrt( r1r2+r2r3+ r1r3)) =

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  4. Prove that in Delta ABC S (( r1- r2) /( a) + ( r2- r)/( b) + ( r3...

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  5. In Delta ABC, if r-1,R=4, Delta =8, then ab+bc+ca=

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  6. If 2( r+R ) = b+ c then A =

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  7. In Delta ABC , (sqrt( r r1r2r3))/( 2Rr ( sin A + sin B + sin C) ) =

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  8. r^(2) cot ""(A)/(2) cot ""(B)/(2) cot ""(C)/(2)

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  9. In DeltaABC,(b-c)/r1+(c-a)/r2+(a-b)/r3=

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  10. The perimeter of a triangle is equal to the diameter of the escribed ...

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  11. r1^(2) = r1r2+ r2r3 +r3r1 triangle is

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  12. In Delta ABC if a: b: c = 3: 7 : 8 then the ratio of circum radius...

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  13. In Delta ABC, (ab-r1 r2)/r3=

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  14. In Delta ABC , if r1 = 8, r2=12 , r3 = 24 then the value of sin B=

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  15. If a = 18 , b= 24 , c= 30 " then" r2 r1 is

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  16. If the sides of a triangle are xy + yz , yz +zx , zx+ xy then inradi...

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  17. If r1 , r2 , r3 are the radii of the escribed circles of a Delta ABC ...

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  18. In a Delta ABC if angle A=90^@, then cos^(-1)(( R)/(r2 +r3)) is equal

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  19. In Delta ABC if a= 26 , b = 30 , cos C ""( 63)/( 65) " then " r2...

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  20. In Delta ABC ( ( s-a))/( Delta) = (1)/( 8) , ( ( s-b))/( Delta ) = (...

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