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In the adjoining figure of DeltaABC, ang...

In the adjoining figure of `DeltaABC, angleBCA=120^(@) and AB = c, BC = a, AC = b` then:

A

`c^2=a^2+b^2+ba`

B

`c^2=a^2+b^2-ba`

C

`c^2=a^2+b^2-2ba`

D

`c^2=a^2+b^2+2ab`

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The correct Answer is:
A
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QUANTUM CAT-GEOMETRY-QUESTION BANK
  1. In the adjoining figure D, E and F are the mid-points of the sides BC,...

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  2. In the adjoining figure angleBAC=60^(@) and BC = a, AC = b and AB = c,...

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  3. In the adjoining figure of DeltaABC, angleBCA=120^(@) and AB = c, BC =...

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  4. In a right angled DeltaABC, angleC=90^(@) and CD is the perpendicular ...

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  5. If the medians of a triangle are equal, then the triangle is :

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  6. The incentre of a triangle is determined by the :

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  7. The circumcentre of a triangle is determined by the :

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  8. The point of intersection of the angle bisectors of a triangle is :

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  9. A triangle PQR is formed by joining the mid-points of the sides of a t...

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  10. If in a DeltaABC,'S' is the circumcentre then :

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  11. If AD, BE, CF are the altitudes of DeltaABC whose orthocentre is H, th...

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  12. In a right angled DeltaABC, angleC=90^(@) and CD is the perpendicular ...

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  13. In an equilateral triangle ABC, if a, b and c denote the lengths of pe...

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  14. What is the ratio of side and height of an equilateral triangle?

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  15. The triangle is formed by joining the mid-points of the sides AB,BC an...

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  16. One side other than the hypotenuse of right angle isoceles triangle is...

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  17. Any two of the four triangles formed by joining the mid - points of th...

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  18. Delta ABC ,angle B external angle C meets at P angle A = 80 " then ...

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  19. The point in the plane of a triangle which is at equal perpendicular d...

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  20. Incentre of a triangle lies in the interior of :

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