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Segment AB is drawn on the grid. A point P lies on AB such that AP : PB = 2 : 1. Find the coordinates of P.

Class 10Coordinate GeometryGeometry — Coordinates
  • A(−1, −1)
  • B(2, 1)
  • C(1/2, 0)
  • D(3, 2)

Step-by-Step Solution

.
Answer: B) (2, 1)

Key idea: Section formula and midpoint

**Section formula (internal)**:
A point dividing segment in ratio closer to A means smaller) has coordinates:



Where ₁, ₁), ₂, ₂).

**Midpoint** is the special case .

**Example**: Find the point dividing in ratio 2:3 where .
Point: (3, 1).

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