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Mathematics

Three isosceles triangles PBC, QBC and RBC are on the same base, then :

  1. P, Q and R are collinear.

  2. △PQR is isosceles triangle.

  3. Q lies on the circumference of a circle with BC as diameter.

  4. Q is mid-point of line segment PR.

Locus

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Answer

Steps of construction :

  1. Draw a line segment BC.

  2. Draw XY, perpendicular bisector of BC.

Three isosceles triangles PBC, QBC and RBC are on the same base, then : Loci, Concise Mathematics Solutions ICSE Class 10.

We know that,

Locus of a point equidistant from two given points is the perpendicular bisector of the line joining the two points.

Thus, any point on the line XY is at equal distance from B and C.

∴ P, Q and R lies on the line XY.

Hence, Option 1 is the correct option.

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