Math Problem Statement

Use the given endpoint R and midpoint M of segment RS to find the coordinates of the other endpoint S. R: ( 7, -17) M: (-2, 3)

Solution

To find the coordinates of the other endpoint S(x,y)S(x, y) of the segment RSRS when given the endpoint R(x1,y1)R(x_1, y_1) and the midpoint M(xm,ym)M(x_m, y_m), you can use the midpoint formula:

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

Given:

  • R(x1,y1)=(7,17)R(x_1, y_1) = (7, -17)
  • M(xm,ym)=(2,3)M(x_m, y_m) = (-2, 3)

Let's denote the coordinates of the other endpoint SS as (x2,y2)(x_2, y_2).

Using the midpoint formula: xm=x1+x22andym=y1+y22x_m = \frac{x_1 + x_2}{2} \quad \text{and} \quad y_m = \frac{y_1 + y_2}{2}

Substitute the values for xmx_m, ymy_m, x1x_1, and y1y_1:

2=7+x22and3=17+y22-2 = \frac{7 + x_2}{2} \quad \text{and} \quad 3 = \frac{-17 + y_2}{2}

Now, solve for x2x_2 and y2y_2:

Solve for x2x_2:

2=7+x22-2 = \frac{7 + x_2}{2} Multiply both sides by 2: 4=7+x2-4 = 7 + x_2 Subtract 7 from both sides: x2=11x_2 = -11

Solve for y2y_2:

3=17+y223 = \frac{-17 + y_2}{2} Multiply both sides by 2: 6=17+y26 = -17 + y_2 Add 17 to both sides: y2=23y_2 = 23

Therefore, the coordinates of the other endpoint SS are (11,23)\boxed{(-11, 23)}.

Would you like to explore any further details or have any other questions?

Here are 5 related questions:

  1. How would you find the distance between the endpoints RR and SS?
  2. What is the equation of the line passing through points RR and SS?
  3. How do you determine if two segments are perpendicular given their endpoints?
  4. Can you verify that the calculated point SS is correct using the midpoint formula?
  5. What would be the coordinates of the midpoint if the endpoints were swapped?

Tip: Always check your final answer by substituting it back into the original equation to ensure accuracy.

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Midpoint Formula

Formulas

Midpoint formula

Theorems

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Suitable Grade Level

Grades 9-10