Sophia Learning
Sophia: Coordinate Geometry of Rectangles
This detailed lesson uses slope, midpoint, and distance formulas to prove a quadrilateral is a rectangle in the coordinate plane.
Sophia Learning
Sophia: Formula for the Area of a Parallelogram
Explore the formula for the area of a parallelogram and complete the quiz to assess understanding.
Sophia Learning
Sophia: Quadrilateral
Quadrilateral is defined and examples are given in this video tutorial. [2:23] Check understanding with a quiz.
Sophia Learning
Sophia: Quadrilateral
In this video tutorial [1:54], explore the term quadrilateral and what objects are defined as quadrilaterals. Take quiz to check understanding.
Sophia Learning
Sophia: Quadrilateral
In this video tutorial [4:00], define the term quadrilateral and what shapes are considered to be quadrilaterals. Take quiz to assess learning.
Sophia Learning
Sophia: Quadrilaterals and Triangles
This video lesson [4:55] describes the characteristics that quadrilaterals and triangles have in common. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Area of a Parallelogram With Triangles and Rectangles
Explore how to find the area of a parallelogram using triangles and rectangles, then assess learning with a quiz.
Sophia Learning
Sophia: Area of a Trapezoid
In this video, students will determine the area of a trapezoid and assess learning with a quiz. [4:24]
Sophia Learning
Sophia: Area of a Trapezoid
In this video, students will use triangles to determine the area of a trapezoid. Assess learning with a quiz. [7:20]
Sophia Learning
Sophia: Area of Quadrilaterals: Taking' It to the Streets
This lesson provides a video that shows examples of various quadrilaterals in the real world. A notes sheet follows describing the characteristics of each quadrilateral and how to find the area of several figures. [3:37]
Virtual Nerd
Virtual Nerd: How Do You Find a Missing Angle in a Quadrilateral?
This tutorial demonstrates how to create an equation and solve it to find the missing measurements in a quadrilateral. [4:13]
Imagine Learning Classroom
Learn Zillion: Classify and Compare Quadrilaterals
In this lesson, you will learn to compare and analyze quadrilaterals by their properties. [4:07]
Loyola University Chicago
Math Flix: Polygons
This video [4:39] provides an opportunity to learn about the characteristics of polygons. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
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."