Q1, W5: September 13-17 Geometry

TeacherKristin Andreason
Subject AreaGeometry Honors
Grade Level8
Week #September 13-17
Unit of InstructionUnit One: Definitions, Segment and Angle Pair Relationships
Standard(s) Taught

MAFS.912.G-GPE.2.5:  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).

MAFS.912.G-GPE.2.6: Find the point on a directed line segment between two given points that partitions the segment in a given ratio.


Learning Targets and Learning Criteria
  • state that parallel lines have the same slope.
  • determine if lines are parallel using their slopes.
  • write the equation for parallel lines.
  • state that perpendicular lines have the opposite reciprocal slopes.(the product of the slopes equals -1).
  • determine if lines are perpendicular using their slopes.
  • write the equation for perpendicular lines.
  • use the slope criteria to prove parallel lines and perpendicular lines.
    • find the point on a directed line segment whose endpoints partitions the line segment into a given ratio. This includes:

                finding a missing endpoint given a point and the other endpoint.

                dividing a segment into thirds, fourths, etc.

               given a ratio, one point and one endpoint finding the other endpoint.

    •  find a ratio when the endpoints and a point on the line segment is given.
Classroom Activities


  1. Students will take notes on Equations of Lines and review slope of lines (p. 9 ISN)
  2. We will do a Point-Slope Form worksheet together
  3. We will do IXL E.4 together in class
  4. We will review parallel lines cut by a transversal


  1. We will do Dance, Dance Transversal


  1. Students will do some task cards on Equations of Lines
  2. Students will do IXL E.4
Assignments Due
  • Task Cards (twelve of them)
  • IXL E.4


Additional Resources

All IEP and ESOL accommodations will be provided daily.