Midpoint Formula in Geometry

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Questions and Answers

What is the formula for finding the midpoint of a line segment?

($\frac{x_1 + x_2}{2}$, $\frac{y_1 + y_2}{2}$)

What does ($x_m$, $y_m$) represent in the midpoint formula?

The coordinates of the midpoint

Flashcards

Midpoint Formula

Calculates the midpoint of a line segment using endpoints.

Coordinates of Midpoint

(Xm, Ym) are derived from the endpoints' coordinates.

Endpoints Coordinates

(x₁, y₁) and (x₂, y₂) are the line segment endpoints.

Slope Formula

Calculates the slope (m) of a line through two points.

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Slope Symbol

Denotes the slope of a line, represented by 'm'.

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Line Segment Distance

Distance formula calculates the distance between two points.

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Distance Variable

d = distance between two points in a plane.

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Perpendicular Lines

Two lines that intersect at a right angle.

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Slope Relationship

For perpendicular lines m₁ = -1/m₂.

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First Degree Equation

Standard form of a linear equation: Ax + By + C = 0.

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Slope-Intercept Form

Equation format: y = mx + b representing a line.

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Dependent Variable (y)

Variable affected by the independent variable in a function.

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Independent Variable (x)

Variable that is changed or controlled in a function.

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Point-Slope Form

y - Y₁ = m(x - x₁) uses a point and slope to find a line's equation.

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Y-Intercept (b)

Point where the line crosses the y-axis in y = mx + b.

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Equations of Lines

Represented mathematically to describe their behavior.

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Change in Y (Δy)

Difference between y-coordinates in slope calculation.

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Change in X (Δx)

Difference between x-coordinates in slope calculation.

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Magnitude of Slope

Indicates how steep or flat the line is.

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Parallel Lines

Lines that never intersect and have the same slope.

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Negative Reciprocal

Value that changes sign and takes the reciprocal.

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Square Root in Distance

Part of the distance formula, denoted by √.

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Standard Coordinate System

2D framework using x and y axes to map points.

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Average of Coordinates

Adding the coordinates and dividing by two gives the midpoint.

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Linear Functions

Functions that graph as straight lines in a coordinate system.

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Calculating Slope

Formulated with the differences of coordinates: (y₂ - y₁)/(x₂ - x₁).

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Relationship Between Distance and Coordinates

Distance directly related to differences in coordinates.

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Graph Representation of Equations

Equations can be visualized as lines on a graph.

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Study Notes

Midpoint Formula

  • The midpoint formula calculates the coordinates of the midpoint of a line segment connecting two points.
  • Given two points (x₁, y₁) and (x₂, y₂), the midpoint (Xm, Ym) is calculated as follows: (Xm, Ym) = ((x₁ + x₂)/2, (y₁ + y₂)/2)
  • Xm is the x-coordinate of the midpoint.
  • Ym is the y-coordinate of the midpoint.
  • (x₁, y₁) are the coordinates of the first point.
  • (x₂, y₂) are the coordinates of the second point.

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