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If a point P divides the line segment joining A(2, 3) and B(8, 7) in the ratio 1

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Question: If a point P divides the line segment joining A(2, 3) and B(8, 7) in the ratio 1:3, what are the coordinates of point P?

Options:

  1. (5, 5)
  2. (4, 4)
  3. (6, 6)
  4. (3, 3)

Correct Answer: (5, 5)

Solution:

Using the section formula: P = ((mx2 + nx1)/(m+n), (my2 + ny1)/(m+n)) where m=1, n=3, A(2,3), B(8,7). P = ((1*8 + 3*2)/(1+3), (1*7 + 3*3)/(1+3)) = (5, 5).

If a point P divides the line segment joining A(2, 3) and B(8, 7) in the ratio 1

Practice Questions

Q1
If a point P divides the line segment joining A(2, 3) and B(8, 7) in the ratio 1:3, what are the coordinates of point P?
  1. (5, 5)
  2. (4, 4)
  3. (6, 6)
  4. (3, 3)

Questions & Step-by-Step Solutions

If a point P divides the line segment joining A(2, 3) and B(8, 7) in the ratio 1:3, what are the coordinates of point P?
  • Step 1: Identify the coordinates of points A and B. A is (2, 3) and B is (8, 7).
  • Step 2: Identify the ratio in which point P divides the line segment. The ratio is 1:3.
  • Step 3: Assign values to m and n based on the ratio. Here, m = 1 and n = 3.
  • Step 4: Use the section formula to find the coordinates of point P. The formula is P = ((mx2 + nx1)/(m+n), (my2 + ny1)/(m+n)).
  • Step 5: Substitute the values into the formula. For the x-coordinate: P_x = ((1*8 + 3*2)/(1+3)).
  • Step 6: Calculate the x-coordinate: P_x = (8 + 6) / 4 = 14 / 4 = 3.5.
  • Step 7: For the y-coordinate: P_y = ((1*7 + 3*3)/(1+3)).
  • Step 8: Calculate the y-coordinate: P_y = (7 + 9) / 4 = 16 / 4 = 4.
  • Step 9: Combine the x and y coordinates to get point P. So, P = (3.5, 4).
  • Section Formula – The section formula is used to find the coordinates of a point that divides a line segment in a given ratio.
  • Ratio Division – Understanding how to apply the ratio to the coordinates of the endpoints to find the coordinates of the dividing point.
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