High School Geometry
Domain Expressing Geometric Properties with Equations
Cluster Use coordinates to prove simple geometric theorems algebraically
Standard 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).

G-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).

  • A Midpoint Miracle
  • Equal Area Triangles on the Same Base I
  • Equal Area Triangles on the Same Base II
  • Parallel Lines in the Coordinate Plane
  • Slope Criterion for Perpendicular Lines
  • Triangles inscribed in a circle
  • Unit Squares and Triangles
  • When are two lines perpendicular?

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