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Intro to Geometry: Undefined Terms

Time Flies
Grade Levels
8th - 11th, Homeschool
Formats Included
  • PDF
  • Activity
20 pages
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Time Flies
Easel Activity Included
This resource includes a ready-to-use interactive activity students can complete on any device. Easel by TpT is free to use! Learn more.

Also included in

  1. This unit is a part of my Geometry Curriculum Bundle. Unit 1 consists of lessons covering the basics of Geometry. There are three complete lessons with notes, practice, activities and assessment. The unit also contains an extra practice for the first two lessons. This unit covers point, line, plane,
    Save $1.68
  2. This is a complete High School Geometry Curriculum. You will receive a combination of worksheets, notes, quizzes, tests, projects and digital activities. All PDF resources can be used in a Google Classroom using the new Teachers Pay Teachers Easel Tool. I am a Texas teacher and I have tried my best
    Save $58.80


How do you introduce High School Geometry? You've got to start with Points, Lines and Planes and then bring in some prior knowledge. It's also time to start talking about postulates! A Google Slides Presentation will take the students through the postulates for this beginning lesson. As a teacher, you will be happy to know that you can use this as a paper/pencil lesson or in your Google Classroom. When you click the option for a digital creation, you will find a lesson ready to go for your virtual learning platform. A digital quiz as well as a printable quiz is available.

This lesson covers:

  • point
  • line
  • plane
  • ray
  • segment
  • angle
  • supplementary
  • complementary
  • acute
  • obtuse
  • right
  • straight
  • adjacent
  • collinear
  • noncollinear
  • coplanar
  • noncoplanar
  • postulates

You will find a bellringer, notes, worksheets, a point, line, plane postulate Google Slides presentation, some patty paper constructions and a quiz. The following standards are covered:


TEKS: G.4(A)

This resource is also in my Geometry Curriculum

Other items in the Geometry Curriculum:

1. Intro to Geometry: Undefined Terms

2. Segment Addition and Angle Addition

3. Distance and Midpoint Activity with Zombie Problem

4. Inductive Vs. Deductive

5. Conditional Statements

Now Included: Google Form Quiz that covers distance, midpoint, inductive, deductive and conditional statements: Click Here

6. Geometry Proof

7. Geometry Exam 1 and 8. Exam 1 Review

9. Parallel Lines and Transversals {With Project}

10. Parallel Lines and Perpendicular Lines Activities and Quiz

11. Geometry: Transformations

12. Congruent Triangle Exploration

13. Concurrent Segments in Triangles {With a Project}

14. Geometry Exam 2

15. Intro to Triangles

16. Pythagorean Theorem and Its Converse

17. Quadrilateral Unit {With Task Cards}

18. Fall Semester Final {Editable}

2nd Semester Starts Here:

19. Similar Triangle Unit}

20. Right Triangles and Geometric Mean

21. Special Right Triangles

22. Right Triangle Test

23. Circles - Special Angles and Segment Properties

Total Pages
20 pages
Answer Key
Teaching Duration
90 minutes
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to see state-specific standards (only available in the US).
Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.


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