B1-B4 Line Study Nomenclature


Move beyond dry geometry memorization. These Montessori Geometry Nomenclature Cards foster a deep, concrete understanding of geometric vocabulary through an interactive, multi-sensory experience perfectly tailored to the way children learn best. Use them with all of your Montessori materials such as the Box of Sticks and Geometry Cabinet.

Designed for ages 6-12, each term is featured on an individual, index-card sized card with a clear image, definition, and engaging etymology to tie into word study. The hands-on cards directly align with Montessori geometry lessons, making them an ideal resource for Montessori classrooms and homeschools.

Once terms are learned, reinforce knowledge using the included control poster – a simple reference chart for children.


  • See list below for terms defined
  • 4 suggested activities for how to use these cards in the elementary classroom.
  • 3 Printable pages that list all of the terms.
  • Control Posters. These are on letter-sized paper.

The nomenclature cards are the size of index cards (3″ x 5″), this gives you a ton of options for storage and is a very manageable size for elementary students. Letter-sized pages are meant to be printed double sided.

Vocabulary Terms included:

Types of Lines B1
  • Straight Lines
  • Curved Line
  • Broken Line
Parts of a Line B2
  • Ray
  • Origin
  • Line Segment
  • Endpoint
Position of a Straight Line B3
  • Horizontal
  • Vertical
  • Oblique
Position of Two Straight Lines B4
  • Parallel
  • Convergent
  • Divergent
  • Intersect
  • Perpendicular Intersect
  • Perpendicular Bisector


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