Khan Academy
Khan Academy: Quadrilateral Properties
Learn about the properties of quadrilaterals, parallelograms, trapezoids, rhombuses, rectangles, and squares.
Khan Academy
Khan Academy: Quadrilateral Types
Learn to identify quadrilaterals such as kites, trapezoids, parallelograms, rhombuses, rectangles, and squares by line and angle type.
Khan Academy
Khan Academy: Intro to Quadrilateral
Learn the term quadrilateral as well as trapezoid, parallelogram, rectangle, rhombus, and square.
Khan Academy
Khan Academy: Kites as a Geometric Shape
Sal discusses a special type of quadrilateral, the kite.
Khan Academy
Khan Academy: Classifying Quadrilaterals
Sal classifies quadrilaterals by their properties (such as parallel sides).
Sophia Learning
Sophia: Trapezoid: Lesson 4
This lesson explains the definition, components, and notations involved in a trapezoid. It is 4 of 7 in the series titled "Trapezoid."
Sophia Learning
Sophia: Trapezoid: Lesson 7
This lesson explains the definition, components, and notations involved in a trapezoid. It is 7 of 7 in the series titled "Trapezoid."
Sophia Learning
Sophia: Using Triangles to Examine Quadrilaterals: Lesson 2
This lesson demonstrates how to determine properties of quadrilaterals by using triangles. It is 2 of 5 in the series titled "Using Triangles to Examine Quadrilaterals."
Sophia Learning
Sophia: Using Triangles to Examine Quadrilaterals: Lesson 4
This lesson demonstrates how to determine properties of quadrilaterals by using triangles. It is 4 of 5 in the series titled "Using Triangles to Examine Quadrilaterals."
Sophia Learning
Sophia: Using Triangles to Examine Quadrilaterals
This lesson demonstrates how to determine properties of quadrilaterals by using triangles.
Sophia Learning
Sophia: Rhombus: Lesson 4
This lesson explains the definition, components, and notations involved in a rhombus. It is 4 of 6 in the series titled "Rhombus."
Sophia Learning
Sophia: Trapezoid: Lesson 6
This lesson explains the definition, components, and notations involved in a trapezoid. It is 6 of 7 in the series titled "Trapezoid."