Linear Equations and Their Forms
This page introduces the fundamental concepts of linear equations and their various forms. It covers the explicit and implicit forms of linear equations, which are essential for understanding the representation of lines in coordinate geometry.
Definition: The explicit form of a linear equation is y = mx + q, where m is the slope and q is the y-intercept.
Definition: The implicit form of a linear equation is ax + by + c = 0, where a, b, and c are constants.
The page also explains methods to determine the equation of a line when given different parameters:
- When a point and the slope are known
- When two points are known
Example: To find the equation of a line passing through a point Px0,y0 with a known slope m, use the formula: y - y₀ = mx−x0
The document then introduces important distance formulas:
Highlight: The distanza punto retta distancefromapointtoaline formula is provided: d = |ax₀ + by₀ + c| / √a2+b2
Highlight: The distanza tra due punti distancebetweentwopoints formula is given for different cases: horizontal, vertical, and oblique segments.
Lastly, the page covers the concepts of the barycenter centroid and midpoint of a triangle, providing formulas to calculate their coordinates.