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In A B C ,(a b-r1r2)/(r3),w h e r ea ,b ...

In `A B C ,(a b-r_1r_2)/(r_3),w h e r ea ,b ,r_1r_2, r_3, Randr` have usual meanings, is equal to (A)`R` (B) `2R` (C) `r` (D) none of these

A

`R`

B

`r`

C

`r_2`

D

`r_3`

Text Solution

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The correct Answer is:
B
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ML KHANNA-PROPERTIES OF TRIANGLES -Problem Set (4)(MULTIPLE CHOICE QUESTIONS)
  1. 1/(bc)+1/(ca)+1/(ab)=

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  2. (r1)/((s-b)(s-c))+(r2)/((s-c)(s-a))+(r3)/((s-a)(s-b))=

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  3. In A B C ,(a b-r1r2)/(r3),w h e r ea ,b ,r1r2, r3, Randr have usual me...

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  4. Value of the expression (b-c)/(r1)+(c-a)/(r2)+(a-b)/(r3) is equal to 1...

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  5. If in a triangle (1-(r(1))/(r(2)))(1-(r(1))/(r(3)))=2, then the trian...

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  6. If the sides of a triangle are in A.P. as well as in G.P. then the val...

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  7. If r1=r2+r3+r prove that the triangle is right angled .

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  8. If in Delta ABC, 8R^(2) = a^(2) + b^(2) + c^(2), then the triangle ABC...

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  9. In a triangle ABC, if (a-b)/(b-c)= (s-a)/(s-c), then r1,r2,r3 are in

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  10. If r1 , r2 , r3 in a triangle be in H.P. then the sides are

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  11. The hormonic mean of r1 ,r2, r3 is

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  12. In a triangle if angleC=90^@ " then " R+r=

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  13. In DeltaABC," if " angleC=90^(@)," then " (a+c)/(b)+(b+c)/(a) is equal...

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  14. The in- radius of the triarigle formed by the axes and the line 4x + 3...

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  15. In a triangle ABC , let angleC=(pi)/2. If r is the in-radius and R is ...

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  16. In a triangle ABC right angled at B, the inradius r is equal to

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  17. In an acute angled triangle which one of the following is true

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  18. Two sides of a triangle are 2 and sqrt3 and the included angle is 30^@...

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  19. Two sides of a triangle are the roots of the equation x^2 - 5x +6=0. I...

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  20. In a triangle ABC if r1=R, then

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