Math Problem Statement

Find the coordinate of A if the midpoint of AB is at (0, 0) and B is at (2, -3).

Solution

To solve this problem, we are given:

  • The midpoint of AB\overline{AB} is at (0,0)(0, 0),
  • The coordinates of point BB are (2,3)(2, -3).

We are asked to find the coordinates of point AA.

Using the Midpoint Formula:

The formula for the midpoint between two points A(x1,y1)A(x_1, y_1) and B(x2,y2)B(x_2, y_2) is:

M=(x1+x22,y1+y22)M = \left( \frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2} \right)

Here, the midpoint MM is (0,0)(0, 0) and the coordinates of point BB are (2,3)(2, -3). Let the coordinates of point AA be (x1,y1)(x_1, y_1).

We can set up two equations using the midpoint formula:

  1. For the x-coordinate: x1+22=0\frac{x_1 + 2}{2} = 0 Multiplying both sides by 2: x1+2=0x_1 + 2 = 0 Solving for x1x_1: x1=2x_1 = -2

  2. For the y-coordinate: y132=0\frac{y_1 - 3}{2} = 0 Multiplying both sides by 2: y13=0y_1 - 3 = 0 Solving for y1y_1: y1=3y_1 = 3

Therefore, the coordinates of point AA are (2,3)(-2, 3).

Would you like further clarification, or have any questions?

Related Questions:

  1. What is the formula for the distance between two points?
  2. How would you find the midpoint if you were given both points AA and BB?
  3. How can you verify the midpoint of two points?
  4. If the midpoint was shifted to a different location, how would that affect the coordinates of AA?
  5. What happens to the midpoint if AA and BB are on the same axis?

Tip:

Always double-check the midpoint formula by plugging the values back in to ensure accuracy!

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Midpoint Formula

Formulas

Midpoint Formula: M = ((x1 + x2)/2, (y1 + y2)/2)

Theorems

Midpoint Theorem

Suitable Grade Level

Grades 8-10