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

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

A

right angled

B

isosceles

C

equilaterial

D

none of these

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The correct Answer is:
A
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OBJECTIVE RD SHARMA ENGLISH-PROPERTIES OF TRIANGLES AND CIRCLES CONNECTED WITH THEM-Exercise
  1. If p(1), p (2), p(3) are respectively the perpendicular from the verti...

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  2. If p(1), p(2),p(3) are respectively the perpendiculars from the vertic...

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

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  4. If A(1),A(2),A(3) denote respectively the areas of an inscribed polygo...

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  5. If the angles of a triangle are in A.P.with common difference equal 1/...

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  6. In a triangle ABC, A = 8, b = 10 and c = 12. What is the angle C equal...

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  7. If the sides a, b, c of a triangle ABC are the roots of the equation x...

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  8. The area of a DeltaABC is b^(2)-(c-a)^(2). Then ,tan B =

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  9. If in a triangle ABC, (sinA)/(sinC) = (sin(A-B))/(sin(B-C)), then

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  10. If in a triangle ABC, 3 sin A = 6 sin B=2sqrt3sin C, then the angle A...

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  11. The sides of a triangle are in A.P. and its area is (3)/(5) th of an e...

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  12. In a triangle sin^(4)A + sin^(4)B + sin^(4)C = sin^(2)B sin^(2)C + 2si...

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  13. In any triangle ABC ,(tan(A/2)-tan(B/2))/(tan(A/2)+tan(B/2)) is equal ...

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  14. If the sides a,b and c of a ABC are in A.P.,then (tan(A/2)+tan(C/2))...

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  15. If the sides of the triangle are the roots of the equation x^(3)-2x^(...

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  16. If AD, BE and CF are the medians of a Delta ABC, then evaluate (AD^(2)...

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  17. If a DeltaABC is right angled at B, then the diameter of the incircle ...

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  18. If a^(2),b^(2),c^(2) are in A.P.,then which of the following is also i...

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  19. If in a Delta ABC, sin ^(3) A + sin ^(3) B+ sin ^(3) C =3 sin A .Sin...

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  20. If the ex-radii of a triangle are in H.P.,then the corresponding sides...

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