Indirect Proofs, Practice Problems, Two Column Proofs - Geometry

This geometry video tutorial provides a basic introduction into indirect proofs. You need to assume the negation of the conclusion or the statement you're trying to prove. This video contains plenty of examples and practice problems of solving indirect proofs with two column proofs.

Triangle Congruence - SSS, SAS, ASA:

CPCTC - 2 Column Proofs With Triangles:

Hypotenuse Leg Theorem - HL Postulate:

Detour Proofs - Double Triangle Congruence:

The Midpoint Formula:

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Missing Diagrams - 2 Column Proofs:

Right Angle Theorem - SSS & SAS:

Perpendicular Bisector Theorem:

Altitude, Median, Midpoint & P. Bisector:

Parallel & Perpendicular Lines - Slope:

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Proving Parallel Lines With Proofs:

The Exterior Angle Theorem:

Exterior Angle Inequality Theorem:

Polygons:

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Final Exams and Video Playlists:

Full-Length Videos and Worksheets:

[Karinagrinchishin]

Thanks this is really helpful. Im a homeschooler and literally just use YouTube videos instead of video lessons all the time and ur videos are great 👍

[georgesadler]

MR. Organic Chemistry Tutor, thank you for an awesome video/lecture on Indirect, Practice Problems and Two Column Proofs in Plane/Solid Geometry. Writing proofs are good practices for students majoring in Science and Engineering. Mathematics and Science are very theoretical in Advanced Courses.

[marygrace]

Thank you so much for this! I have a quiz on this tomorrow and I missed the two in class instruction days on this lesson due to covid. This is about to save my grade tomorrow ❤️

[sparklingcutie]

Bruh, math came from 1+1 to proving something

[yogiyogi]

Please sir make videos on Heterocyclic compounds in organic chemistry

[Oxish]

what if there's only 1 given and that is x=10? and prove

[Cryptic]

I thought indirect proofs were not in columns