This geometry video tutorial provides a basic introduction into two column proofs with parallelograms. It explains the different ways of proving parallelograms. Here are five ways: 1. opposite sides must be parallel. 2. Opposite sides must be congruent. 3. opposite angles must be congruent. 4. 1 opposite side may be both parallel and congruent. 5. Diagonals must be perpendicular bisectors of each other. This video contains plenty of examples and practice problems. Here is a list of theorems used in these two column proofs: reflexive property, vertical angle theorem, definition of a parallelogram, definition of a midpoint, definition of a segment bisector, addition property of equality, substitution property of equality, definition of congruent segments, segment addition, SAS postulate, ASA postulate, and CPCTC.
Polygons: [ Ссылка ]
Angles of Regular Polygons:
[ Ссылка ]
Quadrilaterals:
[ Ссылка ]
Parallelograms:
[ Ссылка ]
Rectangles - Special Quadrilaterals:
[ Ссылка ]
Isosceles Trapezoids:
[ Ссылка ]
_________________________________
The Rhombus:
[ Ссылка ]
Kites:
[ Ссылка ]
Proving a Quadrilateral Is a Kite:
[ Ссылка ]
Proving a Quadrilateral Is a Rhombus:
[ Ссылка ]
__________________________________
Proving Isosceles Trapezoids:
[ Ссылка ]
2 Column Proofs - Quadrilateral:
[ Ссылка ]
Skew Lines:
[ Ссылка ]
Points, Lines, Planes, & Segments:
[ Ссылка ]
_______________________________________
Final Exams and Video Playlists:
[ Ссылка ]
Full-Length Videos and Worksheets:
[ Ссылка ]
Proving Parallelograms With Two Column Proofs - Geometry
Теги
proving parallelogramsparallelogramsgeometrytwo column proofsopposite sidescongruentopposite anglesperpendicular bisectorsdiagonalspractice problemsproblemsbasic introductionexamplesintroductionvertical angle theoremreflexive propertydefinition of a parallelogramproofsdefinition of a midpointsegment bisectordefinitionaddition property of equalitysubstitution property of equalitycongruent segmentssegment additionsasasacpctc
