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If P'(a, b) is the image of the point P(-1, 2) with respect to the line x-2y+3=0, then the length of the perpendicular from P' on to the line 2x+y-7=0 is

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Important Questions on The Straight Line

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If the portion of a straight line intercepted between the coordinate axes is divided by the point (2, 3) in the ratio 2 : 3 then the product of the intercepts made by this line on the axes is
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A straight line passing through origin O intersects the lines 10x-8y-10=0 and x4-y5+1=0 at right angles and at the points P and Q respectively. Then the ratio in which O divides the line segment PQ is
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The incentre of the triangle formed by the straight line having 3 as X-intercept and 4 as Y-intercept, together with the coordinate axes, is
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The distance (in units) between the circumcentre and the centroid of the triangle formed by the vertices (1,2), (3,-1) and (4,0), is

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If the sides of a triangle are 3, 4 and 5 then the circumradius of the triangle is
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A(1, 0), B(0, 2) and C(1, 2) are three points on XY-plane. If a point P(x, y) which moves such that the area of triangle PAB is twice the area of the triangle ABC, then the locus of the point P is
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O0,0, A-3,-1 and B-1,-3 are the vertices of a ΔOAB. P is a point on the perpendicular AD drawn from A on OB such that APPD=34. Then the equation of the line L parallel to OB and passing through P, is
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If the tangent at a point P on the curve y=4x4+x is perpendicular to the tangent to the same curve at (0, 0), then the point P is