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Quadrilateral properties (video) - Khan Academy
Learn about the properties of quadrilaterals, parallelograms, trapezoids, rhombuses, rectangles, and squares. Created by Sal Khan and Monterey Institute for Technology and Education.
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Lesson 6: Theorems concerning quadrilateral properties. Proof: Opposite sides of a parallelogram. Proof: Diagonals of a parallelogram. Proof: Opposite angles of a parallelogram. Proof: The diagonals of a kite are perpendicular. Proof: Rhombus diagonals are perpendicular bisectors. Proof: Rhombus area.
More practice for congruence (high school geometry)
Under the subject "Theorems concerning quadrilateral properties" there are 45 minutes of proof videos and 1 practice module....
Quadrilaterals – Khan Academy Help Center
yes, Khan Academy does provide a course on algebraic equations for quadrilaterals. You can find it in the High school geometry course under congruence where it says theorem concerning quadrilateral properties.
Proof: Opposite sides of a parallelogram (video) | Khan Academy
Let's say that we have some type of a quadrilateral, and we know that the opposite sides are congruent. Can we prove to ourselves that this is a parallelogram? Well, it's kind of the same proof in reverse.
Proof: Opposite angles of a parallelogram - Khan Academy
In geometry two shapes are congruent if they have the same shape or size. So yes, congruent means "Equal in size or shape."
Proof: Rhombus diagonals are perpendicular bisectors - Khan …
Lesson 5: Theorems concerning quadrilateral properties. Proof: Opposite sides of a parallelogram. Proof: Diagonals of a parallelogram ...
Proof: Rhombus area (видео) | Теңдік | Хан академиясы
Lesson 5: Theorems concerning quadrilateral properties. Proof: Opposite sides of a parallelogram. Proof: Diagonals of a parallelogram ...