Two Column Proofs - Proving Isosceles Trapezoids - Geometry

This geometry video tutorial explains how to use two column proofs to do prove if a figure is indeed an isosceles trapezoid. Theorems used in this video include the vertical angle theorem, the AAS triangle congruence postulate, CPCTC, and the reflexive property.
Polygons:
• Polygons
Angles of Regular Polygons:
• How To Calculate The I...
Quadrilaterals:
• Quadrilaterals - Geometry
Parallelograms:
• Parallelograms - Geometry
Rectangles - Special Quadrilaterals:
• Rectangles - Propertie...
Isosceles Trapezoids:
• Isosceles Trapezoids
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The Rhombus:
• Rhombus, Basic Introdu...
Kites:
• Kites, Basic Introduct...
Proving Parallelograms:
• Proving Parallelograms...
Proving a Quadrilateral Is a Kite:
• Proving a Quadrilatera...
Proving a Quadrilateral Is a Rhombus:
• Two Column Proofs - Pr...
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2 Column Proofs - Quadrilateral:
• Two Column Proofs With...
Skew Lines:
• Skew Lines, Perpendicu...
Points, Lines, Planes, & Segments:
• Points, Lines, Planes,...
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Final Exams and Video Playlists:
www.video-tuto...
Full-Length Videos and Worksheets:
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[@Rv12_pilot]

I love how I find this after I fail my midterm.

[@franc1159]

Lmaooo same

[@Miniiii04]

Lmao

[@eduardobarreto6095]

Thank you very much sir.

[@georgesadler7830]

MR. Organic Chemistry Tutor, thank you once again for another monster video/lecture on Proving Isosceles Trapezoids in Solid Geometry. From analyzing the two columns' proofs, I am getting a better read on how proofs are done in Geometry. Proofs are the real deal in higher level Mathematics.

[@rohitduggaraju6160]

thank you

[@alisiaaaaa..3205]

thanks bro!

[@TaiTriH]

Dear, For the example one, I think you need show one more line that BD == AC before the conclusion. Because you didn't give BC // AD And for the example two, should have add AB == CD with BD == AC.

[@DhhddhDydyd]

What is cpc tc