Detour Proofs - Double Triangle Congruence

This geometry video tutorial focuses on detour proofs which is basically proving that two triangles are congruent twice. Triangle congruence theorems in this lesson include the SSS, SAS, and AAS postulates. This geometry video contains two examples on two column proofs with cpctc.

Triangle Congruence - SSS, SAS, ASA:

CPCTC - 2 Column Proofs With Triangles:

Hypotenuse Leg Theorem - HL Postulate:

The Midpoint Formula:

Missing Diagrams - 2 Column Proofs:

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Right Angle Theorem - SSS & SAS:

Perpendicular Bisector Theorem:

Altitude, Median, Midpoint & P. Bisector:

Parallel & Perpendicular Lines - Slope:

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Indirect Proofs - Example Problems:

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:

[iancacciatore]

Hi. Shouldn't statement six at 5:19 be segment DE is congruent to DE? your videos help a lot btw

[michaelnnebe]

You are so amazing. You're videos are life savers. Please don't stop these series ever!!!!

[roshnigupta]

Such a great teacher I've ever seen

[customerservers]

on the second problem you've already found that angle BFD is equals to angle CFE therefore you can conclude and say BD is equals to CE reason opposite equal angles instead of doing the longer method or just say AC = AB reason its Given and AE is equals to AD meaning the portion BD will also be equals to CE.

[hooksetfishing]

thanks these videos are so helpful it seems like youve done one on any topic i search up! thank you very much

[oxygen]

في البرهان الثاني اقدر ابرهن ان الزاويه abe=acd عن الطريق angle- side theorm او لا ؟