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Perpendicular and Parallel Lines 1.5

Time Frame

1 class periods of 30 minutes each


Marcia Kloempken


Students will recognize perpendicular and parallel lines.


Students will need:

  • pencil
  • colored pencils or pens
  • metric ruler
  • protractor
  • scissors

    Background for Teachers

    Knowledge of perpendicular and parallel lines.

    Instructional Procedures

    Notes on definitions.
    Students need to take out all of the above materials.

    1. Draw a line segment that is 9cm long. Label the endpoints A and B.
    2. Beginning at A, draw a line segment perpendicular to AB that is 5 cm long.Label the endpoint C.
    3. Beginning at B, draw a line segment perpendicular to AB that is 5cm long and on the same side of AB as AC. Label the endpoint D.
    4. Draw CD.
    Answer the following questions:
    • Which two segments are parallel?
    • Which segments are perpendicular?
    • What is the angle between AB and AC?
    • Is this true for all angles between the perpendicular lines?
    • If AB is 9cm, how long is CD?
    Design your own business card in this space.

    Assessment Plan

    Create your own business card and turn it in for 10 points!
    Homework: pg 33-34, #5-16

Created: 08/19/2003
Updated: 01/28/2018