Topic outline

  • General


    Geometry (A)

    The main goal of Geometry is for students to develop a Euclidean geometric structure and apply the resulting theorems and formulas to address meaningful problems. Students will use experimentation and inductive reasoning to construct geometric concepts, discover geometric relationships, and formulate conjectures. Students will employ deductive logic to prove theorems and justify conclusions. Students will extend their pre-existing experiences with algebra and geometry to trigonometry, coordinate geometry, and probability. Students will use GeoGebra, compass and straightedge applications, Voice Threads, and other tools to investigate and explore mathematical ideas and relationships and develop multiple strategies for analyzing complex situations. Students will apply mathematical skills and make meaningful connections to life’s experiences.

    Creative Commons License

    Geometry (A) course materials created by the Open High School of Utah are licensed under a Creative Commons Attribution 3.0 Unported License. This course contains open educational resources produced by other organizations which may use a different open license. Please confirm the license status of these third-party resources before reusing them. See OpenCourseWare for additional information about licensing.


    •  Download a copy of this course. File 68.4MB Moodle backup
    •  Geometry Glossary
    •  Course Announcements Forum
  • Topic 1


    •  READ: Points, Lines. and Planes Reading Page
    •  WATCH: Points, Lines, and Planes Presentation Page
    •  WATCH: Points, Lines, Planes Video Page
    •  WATCH: Extra Homework Examples Page
    •  COMPLETE: Guided Practice URL
    •  READ: Segment and Rays Reading Page
    •  WATCH: Segment and Ray's Presentation Page
    •  WATCH: Line Segments Video Page
    •  COMPLETE: Guided Practice URL
    •  READ: Angles Reading Page
    •  WATCH: Angles Presentation Page
    •  WATCH: Angle Homework Example Page
    •  COMPLETE: Guided Practice URL
  • Topic 2

    •  WATCH: Simplifying Radicals Videos Book
    •  READ: Angle Pairs Reading Page
    •  WATCH: Angles Pair Presentation Page
    •  WATCH: Lesson 4 Homework Examples Page
    •  COMPLETE: Guided Practice URL
    •  WATCH: Formulas Presentation Page
    •  WATCH: Midpoint Video Book
    •  WATCH: Slope Video Book
    •  WATCH: Distance Formula Video Page
    •  WATCH: Lesson 5 Homework Exampls Page
    •  COMPLETE: Guided Practice URL
  • Topic 3

    •  READ: Inductive Reasoning Reading Page
    •  WATCH: Inductive Reasoning Video Page
    •  WATCH: Conjecture/Counterexample Video Page
    •  COMPLETE: Guided Practice URL
    •  READ: Conditional Statement Reading Page
    •  WATCH: Conditional Statement Video Page
    •  COMPLETE: Guided Practice Page
  • Topic 4

    •  READ: Deductive Reasoning Reading Page
    •  WATCH: Deductive Reasoning Video Page
    •  WATCH: Law of Detachment/Syllogism Video Page
    •  COMPLETE: Guided Practice Page
    •  READ: Lines and Angles Reading Page
    •  WATCH: Lines and Angles Video Page
    •  COMPLETE: Guided Practice Page
    •  READ: Parallel Lines and Transversals Reading Page
    •  WATCH: Parallel Lines and Transversals Presentation Page
    •  WATCH: Special Angle Pairs Video Page
    •  WATH: Lesson 10 Homework Examples Page
    •  TRY: Angles Activity URL
    •  COMPLETE: Guided Practice URL
  • Topic 5

    •  READ: Proving Lines are Parallel Reading Page
    •  WATCH: Proving Lines are Parallel Presentation Page
    •  WATCH: Proving Lines are Parallel Video Page
    •  WATCH: Proving Lines are Parallel Example Video Page
    •  COMPLETE: Guided Practice URL
    •  READ: Perpendicular Lines Reading Page
    •  WATCH: Perpendicular Lines Video Page
    •  WATCH: Homework Examples Review Video Page
    •  READ: Slopes Reading Page
    •  WATCH: Slopes of Parallel and Perpendicular Lines Presentation Page
    •  WATCH: Slopes of Parallel and Perpendicular Lines Video Page
    •  WATCH: Finding the Slope of a Line Video Book
    •  COMPLETE: Guided Practice URL
  • Topic 6

    •  WATCH: Slope Videos Book
    •  WATCH: Graphing Lines Video Book
    •  READ: Graphing Lines Reading Page
    •  WATCH: Point Slope Form Video Book
    •  WATCH: Writing Equations of Lines Video Book
    •  COMPLETE: Guided Practice URL
    •  READ: Classifying Triangles Reading Page
    •  WATCH: Classifying Triangles Presentation Page
    •  WATCH: Classifying Triangles Video Page
    •  WATCH: Lesson 15 Homework Examples Video Page
    •  COMPLETE: Guided Practice URL
  • Topic 7

    •  READ: Triangle Sums Reading Page
    •  WATCH: Triangle Sum Video Book
    •  WATCH: Exterior Angles Video Book
    •  WATCH: Lesson 16 Homework Examples Video Page
    •  COMPLETE: Guided Practice URL
    •  READ: Congruent Figures Reading Page
    •  WATCH: Triangle Congruence Presentation Page
    •  COMPLETE: Guided Practice URL
    •  READ: Triangle Congruence/ SSS SAS Reading Page
    •  WATCH: SSS/SAS Video Book
    •  WATCH: Lesson 18 Homework Example Video Page
    •  COMPLETE: Guided Practice URL
  • Topic 8

    •  READ: ASA AAS Reading Page
    •  WATCH: ASA AND AAS Video Book
    •  WATCH: ASA-AAS Examples Page
    •  ****WATCH: NEW Lesson 19 Homework Example******* Page
    •  COMPLETE: Guided Practice URL
    •  WATCH: Triangle Congruence Review Presentation Page
    •  COMPLETE: Guided Practice URL
  • Topic 9

    •  WATCH: Fraction Review Video File
    •  READ: HL Theorem Reading Page
    •  WATCH: HL Theorem Video Book
    •  COMPLETE: Guided Practice URL
    •  READ: Using Congruent Triangles Reading Page
    •  WATCH: CPCTC Video Page
    •  WATCH: CPCTC Example Video Page
  • Topic 10

    •  READ: Isosceles and Equilateral Triangles Reading Page
    •  WATCH: Isosceles Triangle Presentation Page
    •  WATCH: Isosceles Triangle Video Book
    •  WATCH: Equilateral Triangle and Homework Examples Page
    •  COMPLETE: Guided Practice URL
    •  READ: Midsegment Reading Page
    •  WATCH: Midsegment Video Book
    •  COMPLETE: Guided Practice Page
  • Topic 11


    •  READ: Perpendicular Bisector Reading Page
    •  WATCH: Perpendicular Bisector Video Page
    •  WATCH: Constructing Perpendicular Bisector by Hand Video Page
    •  WATCH: Constructing Perpendicular Bisectors on Geogebra Video URL
    •  How to Create a Screencast Instructions File
    •  READ: Angle Bisector Reading Page
    •  WATCH: Angle Bisector Video Page
    •  WATCH: Constructing an Angle Bisector Video Page
    •  WATCH: Constructing Angle Bisectors Using GeoGebra Video URL
    •  WATCH: Incenter Video Page
    •  READ: Median Reading Page
    •  WATCH: Median/Centroid Video Book
    •  WATCH: Constructing a Centroid Using GeoGebra Video URL
  • Topic 12

    •  READ: Altitude Reading Page
    •  WATCH: Altitude Video Page
    •  WATCH: Orthocenter Video Page
    •  WATCH: Constructing an Orthocenter Using GeoGebra Video URL
    •  READ: Triangle Inequality Reading Page
    •  WATCH: Triangle Inequality Presentation Page
    •  WATCH: Triangle Inequality Video Book
    •  COMPLETE: Guided Practice URL
  • Topic 13

    •  READ: Classifying Polygon Reading Page
    •  TRY: Polygon Sort Activity URL
    •  READ: Interior Angles Reading Page
    •  WATCH: Interior Angle Video Book
    •  WATCH: Finding One Interior Angle Video Book
    •  COMPLETE: Guided Practice URL
    •  READING: Exterior Angles Reading Page
    •  WATCH: Exterior Angles of a Polygon Video Book
  • Topic 14

    •  READ: Classifying Quadrilaterals Reading Page
    •  WATCH: Classifying Quadrilateral Video Page
    •  WATCH: Classifying Quadrilateral Video 2 Page
    •  TRY: Classifying Quadrilateral Application URL
    •  READ: Parallelogram Reading Page
    •  WATCH: Parallelogram Presentation Page
    •  WATCH: Parallelogram Video Book
    •  PRINT: Parallelogram Properties File
    •  EXPLORE: Play Around with Parallelogram Properties URL
    •  EXPLORE: Play Around with Parallelogram Properties-2 URL
    •  COMPLETE: Guided Practice URL
  • Topic 15

    •  READ: Proving Quadrilaterals are Parallelograms Reading Page
    •  WATCH: Proving Parallelograms Presentation Page
    •  WATCH: Proving Parallelograms Video Page
    •  COMPLETE: Guided Practice URL
    •  READ: Rhombi Reading Page
    •  WATCH: Rhombi Presentation Page
    •  WATCH: Rombi Video Book
    •  PRINT: Properties of a Rhombus File
    •  EXPLORE: Discovering Rhombi Properties URL
    •  COMPLETE: Guided Practice URL
    •  READ: Rectangles and Squares Reading Page
    •  WATCH: Rectangles and Squares Presentation Page
    •  WATCH: Rectangle and Square Video Book
    •  WATCH: Classifying on a Coordinate Grid Video Page
    •  PRINT: Properties of a Rectangle File
    •  PRINT: Properties of a Square File
    •  EXPLORE: Discovering Rectangle Properties URL
    •  COMPLETE: Guided Practice URL
  • Topic 16

    •  READ: Trapezoid Reading Page
    •  WATCH: Trapezoid Presentation Page
    •  WATCH: Trapezoid Video Book
    •  WATCH: Trapezoid Midsegment Video Book
    •  PRINT: Properties of a Trapezoid File
    •  READ: Kite Reading Page
    •  WATCH: Kite Video Book
    •  PRINT: Properties of a Kite File
    •  EXPLORE: How are Kites, Squares, and Rectangles Related? URL
    •  ACTIVITY: Review Classifying Quadrilaterals URL
  • Topic 17

    •  WATCH: Fraction Review Video File
    •  ACTIVITY: Quadrilateral Quest (Know the Properties Before the Test!!) URL
    •  READ: Ratios and Proportions Reading Page
    •  WATCH: Ratios and Proportions Presentation Page
    •  WATCH: Ratios and Proportions Video Book
    •  WATCH: Solving Problems Using Proportions Video Page
    •  READ: Similar Polygons Reading Page
    •  WATCH: Similar Polygons Presentation Page
    •  WATCH: Similar Polygons Video Book
    •  Solving Proportions Video File
  • Topic 18

    •  READ: Similarity Shortcuts Reading Page
    •  WATCH: Similarity Shortcuts Presentation Page
    •  WATCH: Similarity Shortcuts Video Book
    •  COMPLETE: Guided Practice URL
  • Topic 19


    •  READ: Proportionality Relationships Reading Page
    •  WATCH: Proportionality Relationships Presentation Page
    •  WATCH: Proportionality Relationships Video Book
  • Topic 20


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