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if ar((triangle)PQR) is zero, then the p...

if ar(`(triangle)`PQR) is zero, then the points P,Q and R A are --------------.

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if ar( (triangle) PQR) is zero, then the points P,Q and R are --------------.

In a triangle PQR , the co-ordinates of the points P and Q are ( -2,4) and ( 4,-2) respectively. If the equation of the perpendicular bisector of PR is 2x - y+2=0 , then the centre of the circumcircle of the Delta PQR is :

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X BOARDS-CBSE BOARDS 2020-SECTION -A
  1. The discriminant of the quadratic equation 4x^2 - 6x +3 = 0 is (A) 1...

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  2. For the following frequency distribution The upper limit of media...

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  3. If Cos A =(sqrt(3))/(2), 0^(@) lt A lt 90^(@) , then A is equal to

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  4. The probability of an impossible event is 0 (b) 1 (c) 1//2 (d) n...

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  5. If a pair of linear equations is consistent, then the lines represente...

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  6. the distance between the points (3,-2) and (-3,2) is

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  7. 180 can be expressed as a product of its prime factors as

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  8. The total surface area of frustum shaped glass tumbler is (r1 (gt) r2)...

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  9. If 2 is a zero of the polynomial ax^2-2x then the value of a is ........

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  10. if the radii of two spheres are in the ratio 2:3, then the ratio of th...

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  11. A line intersecting a circle in two points is called a .

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  12. if ar((triangle)PQR) is zero, then the points P,Q and R A are --------...

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  13. All squares are . (congruent/similar)

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  14. A coin is tossed twice, the probability of getting head both the times...

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  15. Find the radius of the sphere whose surface area is 36pi cm^(2).

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  16. Find the value of x so that -6, x, 8 are in AP

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  17. Find the 11^(th) term of the A.P. -27, -22, -17, -12......

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  18. In figure , the angle of elevation of the top of a tower AC from a poi...

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  19. Evaluate tan 40^@ xx tan 50^@

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  20. If cos A = sin 42^@, then find the value of A.

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