Proving Triangle Congruence through Transformations

Geogebra Animations
A Geogebra Animation that is freaking AWESOME
(Check this out first!)
An Excellent Geogebra animation
(This one is beautiful!!)

You Tube Videos
Video connecting Transformations to Animation
(Great video on the connection of transformation and how it applies to a career.)
A cartoon explaining Transformation
A Game Using All 3 Transformations
Another Transformation Game
Transformation Game

Video 1
Video 2
(Glide Reflections – Translation followed by a reflection)
Video 3
(Compositions of Reflections)
Video
(Glide Reflections and Compositions of Reflections)
Video
(Composition of Reflections)
Video 4
(A little long but could be helpful)
Video 5
Video 6
Video 7
(Composition of Reflections)

Great document illustrating the details of a proof
Document that outlines what a proof is and provides an example 
Higher leveled thought on what a proof is 

Vertical Angles
Vertical Angles 1
Vertical Angles 2
Vertical Angles 3


Alternate Interior Angles
Alternate Interior Angles 1
Alternate Interior Angles 2
Alternate Interior Angles 3


Alternate Exterior Angles
Alternate Exterior Angles 1
Alternate Exterior Angles 2
Alternate Exterior Angles 3


Corresponding Angles
Corresponding Angles 1
Corresponding Angles 2
Corresponding Angles 3



Alternate Interior, Alternate Exterior, Vertical and Corresponding Angles
All 4 Congruent Angles Together 1
All 4 Congruent Angles Together 2


Adjacent Angles
Adjacent Angles 1
Adjacent Angles 2
Adjacent Angles 3


Same Side Interior Angles (Consecutive Angles)
Same Side Interior Angles (Consecutive) Angles 1
Same Side Interior Angles (Consecutive) Angles 2
Same Side Interior Angles (Consecutive) Angles 3


Powerpoints and Interactive Activities
– Angles formed from Parallel lines and Transversals Interactive Problems (1)
– Angles formed from Parallel lines and Transversals Interactive Problems (2)
–Angles from Parallel lines and Transversals practice problems
(Must be completed on a separate sheet of paper. This site does provide one answer to the proof.)

Congruence
Right Angles (using a Right triangle as an example) 
Angle Bisector 
Perpendicular Bisector 
Translation
Reflection 
“Reflected Triangles” – Something Extra 
Rotation  
“Rotated Triangles” – Something Extra 
Side-Side-Side (SSS) (triangle congruency) 
Side-Angle-Side (SAS) (triangle congruency) 
Angle-Side-Angle (ASA) (triangle congruency) 
Angle-Angle-Side (AAS) (triangle congruency) 
Hypotenuse-Lg (HL) (Triangle Congruency) 
Corresponding Parts of Congruent Triangles are Congruent (CPCTC) 

Congruent Line Segments
Congruent Angles
Corresponding Parts of Congruent Triangles are Congruent 
Congruent Triangles Illustration and Notes
Reflected Triangle Congruence
Rotated Triangle Congruence
Geogebra Online Interactive Worksheets
A Geogebra demonstration of Congruent Figures using Transformation (AWESOME) 
(Definitely check this one out) 
Geogebra Worksheet for Congruent Triangles  (1) – ASA
Geogebra Worksheet for Congruent Triangles (2)  – SAS
Geogebra Worksheet for Congruent Triangles (3) – SSS
Geogebra Worksheet for Congruent Triangles (4) 
Awsome Geogebra Video Connecting Congruent Triangles with Circles 
Constructing a triangle with Compass and Straightedge on Geogebra 

Mr. Lakey’s Personally Made Geometric Proof Videos

Proofs on Paper
Angles
Paper based proof #1
Paper based proof #2


Triangles
Triangle Proof Practice #10
(Added on 3-16-20)

Triangle Proof Practice #8
(Added on 3-18-20)
Triangle Proof Practice #20
(Added on 3-18-20)
Triangle Proof Practice #21
(Added on 3-18-20)
Take Home Exam #5
(Added on 3-20-20)
Take Home Exam #6
(Added on 3-20-20)
Take Home Exam #13
(Added on 3-20-20)
Take Home Exam #15
(Added on 3-20-20)
Sec. 1. 6 Letter “e”
(Added on 3-24-20)
Sec 1.6 Letter “g”
(Added on 3-25-20)
Sec 1.6 Letter “i”
(Added on 3-25-20)
Sec 1.6 Letter “d”
(Added on 3-25-20)

CanFigureit Proofs
Angles
Alternate Exterior Angles 13

Triangles
SSS #7
SSS #4
SSS #6
SAS #4
ASA #4
ASA #7
SAS #11
(Added on 3-16-20)

SSS – Illustration and Notes (1)
Geogebra Interactive Worksheet for Congruent Triangles (3) – SSS
Step by Step Screen Cast (Very Good) 
Excellent Geogebra Interactive Worksheet  
Geogebra Construction Interactive Worksheet 

ASA – Illustration and Notes (1)
Geogebra Interactive Worksheet for Congruent Triangles  (1) – ASA
Excellent Geogebra Interactive Worksheet  

SAS – Illustration and Notes (1)
Geogebra Interactive Worksheet for Congruent Triangles (2)  – SAS
Excellent Geogebra Interactive Worksheet 
Geogebra Construction Interactive Worksheet on SAS 
Construct a SAS triangle 

Hypotenuse & Leg (HL) – Illustration and Notes (1)
Step by Step Screen Cast
(Excellent Notes)
Excellent Geogebra Interactive Worksheet 

Excellent Site for Online Triangle Proof Practice
IXL – Continued Proof Practice
2 Column Proof Practice
(Great SITE!)

Why SSA does not work (1)
Step by Step Screen cast (1)
Excellent video that shows if you have two possible solutions this is a shortcut that is not always consistent.
Step by Step Screen Cast (2)
Excellent video that shows when this can work.
Excellent Geogebra Interactive Worksheet 

Excellent Geogebra Interactive Worksheet