High School · Expressing Geometric Properties with Equations

CCSS.MATH.CONTENT.HSG.GPE.B.5

Prove the slope criteria for parallel and perpendicular lines and use them to solve geometric problems (e.g., find the equation of a line parallel or perpendicular to a given line that passes through a given point).

Read this standard on the official Common Core site

Lessons that teach this standard

• Parallel and Perpendicular Lines: The Slope Rules

  Parallel lines have equal slopes and perpendicular lines have negative reciprocal slopes — why both rules are true, and how to write equations using them.