Units (select a unit)

• Points, Lines, and Planes

  Intro to Geometry
  Points & Lines
  Planes
  Congruence, Distance & Length
  Constructions & Loci
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• Angles

  Angles
  Congruent Angles
  Angles & Angle Addition Postulate
  Protractors
  Special Angle Pairs
  Introduction to Proofs
  Proofs Special Angles
  Angle Bisectors
  Locus & Angle Constructions
  Angle Bisectors & Constructions
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• Parallel Lines

  Lines: Intersecting, Parallel & Skew
  Lines & Transversals
  Parallel Lines & Proofs
  Properties of Parallel Lines
  Constructing Parallel Lines
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• Triangles

  Triangles
  Triangle Sum Theorem
  Exterior Angle Theorem
  Inequalities in Triangles
  Similar Triangles
  - AA~
  - SSS~
  - SAS~
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• 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
  View

• Congruent Triangles

  Congruent Triangles
  Proving Congruence: SSS
  Proving Congruence: SAS
  Proving Congruence ASA
  Proving Congruence AAS
  Proving Congruence HL
  Triangle Congruence Proofs
  CPCTC
  Isosceles Triangle Theorem
  
  View

• Circles

  Parts of a Circle
  Central Angles & Arcs
  Arc Length & Radians
  Chords, Inscribed Angles & Triangles
  Tangents & Secants
  Segments and Circles
  
  View

• 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
  View

• Transformations

  Transformations
  Translations
  Reflections
  Rotations
  Identifying Symmetry w/ Transformations
  Composition of Transformations
  Congruence Transformations
  Dilations
  Similarity Transformations
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• Quadrilaterals

  Polygons
  Properties of Parallelograms
  Proving Quads are Parallelograms
  Rhombi, Rectangles & Squares
  Trapezoids
  Kites
  Constructing Quadrilaterals
  Families of Quadrilaterals
  Proofs
  Coordinate Proofs
  View

• 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
  View

• 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
  View

• Probability

  Probability of Simple Events
  Probability & Length
  Probability & Area
  View

Hi! I was wondering on the Circles Unit Review Extended Response #1 part c, if there should be more information given or if the answer is wrong. I, along with my students, are very curious about it. Thanks!
Deb Yoast

Dear Deb Yoast,

Thank you for your comment. Enough information was given in the problem to solve it. However, the solution was incorrect and has been updated to read AT = 16. Please download an updated copy of the Circles CW-HW file at your convenience. Please let me know if more information is needed or any questions arise.

Kind regards,

Audra

One more question on the same problem, the problem gives that AB = 25; shouldn't it be (21 sq. root 2) since the 2 hypotenuses are 16 sqrt 2 and 5 sqrt 2? And actually the length of AB is not needed to solve the problem.

Dear Deb Yoast,

Thank you for your comment. Yes, the length of segment AB being 25 was incorrect. Since it is not required when finding the solution to the problem, its length has been removed. Please download an updated copy of the file at your earliest convenience. Please let me know if more information is needed or any questions arise.

Kind regards,

Audra

I have noticed that some answers in formative assessments in geometry are wrong. I just ran into one of them in module 8 topic 2. The distance between the two points was square root of 34 but it says it is wrong.

Hi, Christine,

Thank you for your comment, and for providing details via email. The solution to this formative assessment question has been updated in the online course. 

Please let us know if more information is needed or any questions arise.

Kind regards,

Audra

Hello! The Quadrilaterals Unit Test on #8 is missing the picture of the trapezoid. Thanks!

Dear Deb Yoast,

Thank you for your comment. The diagram for Quadrilaterals Test Question #8 has been added back into the test. Please download an updated copy of the file at your earliest convenience.

Please let us know if more information is needed or any questions arise.

Kind regards,

Audra