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Khan Academy (English - US curriculum)
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Khan Academy (English - US curriculum)
Math by grade
High school
High school geometry
Analytic geometry
Equations of parallel & perpendicular lines
Equations of parallel & perpendicular lines
Learn all about equations of parallel and perpendicular
Parallel lines from equation
Parallel lines from equation (example 2)
Parallel lines from equation (example 3)
Perpendicular lines from equation
Parallel & perpendicular lines from equation
Writing equations of perpendicular lines
Writing equations of perpendicular lines (example 2)
Write equations of parallel & perpendicular lines
Proof: parallel lines have the same slope
Proof: perpendicular lines have opposite reciprocal slopes
