Geometry Course

This is our newly revised High School Geometry Course that is aligned to the Common Core. All of the released PARCC Sample Questions are also embedded directly into the presentations. The 2014-2015 course is archived. You can get to that course by clicking this link.

Thank you to those who contribute to our ongoing cycle of improvement. Top contributors:
Suzanne Nichols-Salazar - Perth Amboy, NJ
Ruth Tocco - Haddon Heights, NJ
Angela Slaterpryce - Schroon Lake, NY

Units (select a unit)

  • Points, Lines, and Planes
    Intro to Geometry
    Points & Lines
    Congruence, Distance & Length
    Constructions & Loci
  • Angles
    Congruent Angles
    Angles & Angle Addition Postulate
    Special Angle Pairs
    Proofs Special Angles
    Angle Bisectors
    Locus & Angle Constructions
    Angle Bisectors & Constructions
  • Parallel Lines
    Lines: Intersecting, Parallel & Skew
    Lines & Transversals
    Parallel Lines & Proofs
    Properties of Parallel Lines
    Constructing Parallel Lines
  • Triangles
    Triangle Sum Theorem
    Exterior Angle Theorem
    Inequalities in Triangles
    Similar Triangles
    - AA~
    - SSS~
    - SAS~
  • Similar Triangles & Trigonometry
    Problem Solving w/ Similar Triangles
    Similar Triangles & Trigonometry
    Trigonometric Ratios
    Inverse Trigonometric Ratios
    Review of the Pythagorean Theorem
    Converse of the Pythagorean Theorem
    Special Right Triangles
  • Congruent Triangles
    Congruent Triangles
    Proving Congruence: SSS
    Proving Congruence: SAS
    Proving Congruence ASA
    Proving Congruence AAS
    Proving Congruence HL
    Triangle Congruence Proofs
    Isosceles Triangle Theorem
  • Circles
    Parts of a Circle
    Central Angles & Arcs
    Arc Length & Radians
    Chords, Inscribed Angles & Triangles
    Tangents & Secants
    Segments and Circles
  • Analytic Geometry
    Origin of Analytic Geometry
    Distance Formula
    Midpoint Formula
    Partitions of a Line Segment
    Slopes of Parallel & Perpendicular Lines
    Eq of Parallel & Perpendicular Lines
    Triangle Coordinate Proofs
    Equation of a Circle & Completing the Square
  • Transformations
    Identifying Symmetry w/ Transformations
    Composition of Transformations
    Congruence Transformations
    Similarity Transformations
  • Quadrilaterals
    Properties of Parallelograms
    Proving Quads are Parallelograms
    Rhombi, Rectangles & Squares
    Constructing Quadrilaterals
    Families of Quadrilaterals
    Coordinate Proofs
  • Area of Figures
    Area of Rectangles
    Area of Triangles
    Law of Sines
    Area of Parallelograms
    Area of Regular Polygons
    Area of Circles & Sectors
    Area of Other Quadrilaterals
    Area and Perimeter of Figures in the Coordinate Plane
  • 3D Geometry
    Intro to 3-D solids
    Views & Drawings of 3-D Solids
    Surface Area of Prisms, Cylinders, Pyramids & Cones
    Volume of Prisms Prisms, Cylinders, Pyramids & Cones
    Surface Area & Volume of Spheres
    Cavalieri’s Principle
    Similar Solids
  • Probability
    Probability of Simple Events
    Probability & Length
    Probability & Area


Samuel Cerritos • 1 year, 3 months agologin to reply

I truly like the new navigation map and its tabs.-Outstanding-

Audra Crist • 1 year, 3 months agologin to reply

Dear Mr. Cerritos, Thank you for your kind words. Please do not hesitate to leave additional feedback in any of our courses. Kind regards, Audra

Deb Yoast • 8 months agologin to reply

I like the set up of the homework problem sets! :) I was wondering, will you be doing Unit Plans for this course like the others have? Thanks!

Audra Crist • 8 months agologin to reply

Dear Ms. Yoast, Yes, we have unit plans made in each unit. They can be found in the "Teacher Resource" category (found w/in each unit). Here is a link to the Unit Plan for the Parallel Lines Unit: Kind regards, Audra

Linda Gerdes • 6 months, 1 week agologin to reply

My class has found what we believe are errors in the homework answers. For Rotation homework, the anawer to #3c should be CD and the answer to to #CD. Also #4a and 4c are using the wrong rule. Correct answers for #4a we believe is (D(3,-2); E(-2,-4); F(-2,-7), G(2,-5); Correct answer for #4c is D(-3,2); E(2,4); F(2,7); G(-2,5). We also believe the answer to #5 is P'(-5,-1); Q'(-4,3); R'(4,2); S'(2,-3). Also #8 for the identifying symmetry with transformations. If you trace the figure and try to rotate it, it does not map onto itself.

Audra Crist • 6 months, 1 week agologin to reply

Dear Ms. Gerdes, Thank you for your comment. We will be making changes to the problems &/or answers that you mentioned within the next few business days. I'll reply again once the updated files have been posted. Kind regards, Audra

Audra Crist • 6 months agologin to reply

Dear Ms. Gerdes, Thank you again for the comment that you left prior to the Thanksgiving holiday. The CW-HW file has been changed to reflect the corrections that you mentioned, including the re-drawing of the figures in the HW section of Identifying Symmetry with Transformations to make the answers correct. Kind regards, Audra

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