Two Column Proofs With Parallelograms, Isosceles Trapezoids, Rhombuses, and Kites – Geometry

This geometry video tutorial provides a basic introduction into proving parallelograms, isosceles trapezoids, rhombuses, and kites using two column proofs. Theorems used in this video include the vertical angle theorem, alternate interior angles, parallel lines, SAS and AAS triangle congruence postulate, CPCTC, reflexive property, and the definition of angle bisector.

Polygons:

Angles of Regular Polygons:

Quadrilaterals:

Parallelograms:

Rectangles – Special Quadrilaterals:

Isosceles Trapezoids:

_________________________________
The Rhombus:

Kites:

Proving Parallelograms:

Proving a Quadrilateral Is a Kite:

Proving a Quadrilateral Is a Rhombus:

__________________________________
Proving Isosceles Trapezoids:

Skew Lines:

Points, Lines, Planes, & Segments:

_______________________________________
Final Exams and Video Playlists:
https://www.video-tutor.net/

Full-Length Videos and Worksheets:
https://www.patreon.com/MathScienceTutor/collections