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If the sides of a triangle are a, b and `sqrt(a^(2) + ab + b^(2))`, then find the greatest angle

A

`60^(@)`

B

`90^(@)`

C

`120^(@)`

D

`135^(@)`

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The correct Answer is:
C
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OBJECTIVE RD SHARMA-PROPERTIES OF TRIANGLES AND CIRCLES CONNECTED WITH THEM-Chapter Test
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  7. If the angles A, B, C (in that order) of triangle ABC are in arithmeti...

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  9. Two sides of a triangle are 2sqrt2 and 2sqrt3cm and the angle opposite...

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  10. In a triangleABC, a=13cm, b=12 and c=5cm The distance of A from BC is

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  11. In a triangleABC,B=pi/8, C=(5pi)/(8). The altitude from A to the side ...

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  12. In a DeltaABC, A=(2pi)/3, b-c=3sqrt3 cm and area(DeltaABC)=(9sqrt3)/2 ...

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  13. In DeltaABC if a=(b-c)sectheta then (2sqrt(bc))/(b-c)sin(A/2)=

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  14. In a DeltaABC, (a + b + c) (b + c - a) = lambda bc. (where symbols ha...

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  15. If in DeltaABC, a=2b and A=3B, then A is equal to

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  16. Let the angles A , B and C of triangle A B C be in AdotPdot and let b ...

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  17. If in a Delta ABC, AD, BE and CF are the altitudes and R is the circum...

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  18. If in a triangleABC=(a)/(cos A)=(b)/(cos B), then

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  19. In a triangleABC, s/R=

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  20. If in a triangleABC, A=pi/3 and AD is the median, then

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