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If one vertex of an equilateral triangle...

If one vertex of an equilateral triangle is at `(2.-1)` 1base is `x + y -2 = 0`, then the length of each side, is

A

`sqrt(3//2)`

B

`sqrt(2//3)`

C

`2//3`

D

`3//2`

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The correct Answer is:
B
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OBJECTIVE RD SHARMA ENGLISH-STRAIGHT LINES-Exercise
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  4. The area of the parallelogram formed by the lines 3x-4y + 1=0, 3x-4y +...

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  5. Points A (1, 3) and C (5, 1) are opposite vertices of a rectangle ABCD...

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  6. The line x+ 2y=4 is-translated parallel to itself by 3 units in the se...

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  7. The line PQ whose equation is x-y = 2 cuts the x-axis at P, and Q is (...

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  10. The vertices of a diagonal of a square are (-2,4) and (-2,-2) Find the...

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  11. The equations of two sides of a square whose area is 25 sq.units are 3...

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  12. Centroid of the triangle, the equations of whose sides are 12x^(2)-20x...

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  13. If the lines a x+2y+1=0,b x+3y+1=0a n dc x+4y+1=0 are concurrent, then...

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  14. Two vertices of a triangle are (5,-1) and (-2,3) If the orthocentre of...

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  15. If the foot of the perpendicular from the origin to a straight line is...

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  16. A rectangle has two opposite vertices at the points (1,2) a n d (5,5)....

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  17. The orthocentre of the triangle formed by the lines x y=0 and x+y=1 is...

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  18. A line passes through the point (2,2) and is perpendicular to the line...

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  19. A line passes through (2, 2) and is perpendicular to the line 3x+y=3. ...

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  20. Given three straight lines 2x+11 y-5=0,24 x+7y-20=0, and 4x-3y-2=0 . T...

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