Virtual Nerd
Virtual Nerd: What Is a Parallelogram?
Video tutorial takes a look at parallelograms and explores what kinds of quadrilaterals can also be called parallelograms. [7:17]
Virtual Nerd
Virtual Nerd: What Is a Quadrilateral?
Watch this tutorial to learn about quadrilaterals and their special types. [4:52]
Virtual Nerd
Virtual Nerd: What Is a Square?
Video tutorial explores squares and explains their special properties. [5:59]
Virtual Nerd
Virtual Nerd: What Is a Rhombus?
This tutorial introduces you to the rhombus and explains its special properties. [5:15]
Khan Academy
Khan Academy: Geometry: Perimeter of a Polygon
Shows how to find the perimeter of a parallelogram. [1:20]
Khan Academy
Khan Academy: Geometry: Area, Pythagorean Theorem
This video shows an understanding of the sum of the interior angles of polygons, properties of parallelogram, lateral area of a cone, area of a kite, and circumference of a circle.
Khan Academy
Khan Academy: Quadrilaterals: Quadrilateral Overview
This video identifies and defines concave quadrilaterals, convex quadrilaterals, trapezoids, parallelgrams, rectangles, rhombi, and squares.
Sophia Learning
Sophia: Classifying Quadrilaterals
This video tutorial describes how to classify quadrilaterals using key characteristics such as parallel sides and right angles. [4:27]
Sophia Learning
Sophia: Classifying Quadrilaterals
Quadrilaterals are explored in this video lesson. The tutorial describes the characteristics of various quadrilaterals. Students can check their understanding with an assessment. [6:17]
Sophia Learning
Sophia: Coordinate Geometry of Parallelograms
This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a parallelogram in a coordinate plane. Students can check their understanding with an...
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: The Parallelogram Rule
A video presentation explaining the parallelogram rule for combining non-parallel vectors. [4:54]
Sophia Learning
Sophia: Area of a Parallelogram With Triangles and Rectangles
In this video tutorial lesson, determine the area of a parallelogram using triangles and rectangles then assess learning with a quiz. [3:34]
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 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]
Math Mammoth
Math Mammoth: Parallelograms
This video explores the properties of parallelograms. Demonstrates how to measure their lines and angles and how to draw one, and presents drawing problems for students to try on their own. [10:09]
Virtual Nerd
Virtual Nerd: How Do You Classify Quadrilaterals?
Quadrilaterals are figures with four sides and there are many different types. Watch this tutorial and try to figure out the name for any given quadrilateral. [11:03]
Khan Academy
Khan Academy: Geometry: Proof: Opposite Sides of Parallelogram Congruent
Demonstrates how to prove that the opposite sides of a parallelogram are congruent based on knowledge of the special angles created when parallel lines are cut by a transversal and the triangle congruency postulates. [8:30]
Khan Academy
Khan Academy: Geometry: Proof: Opposite Angles of Parallelogram Congruent
This video tutorial demonstrates how to prove that the opposite angles of a parallelogram are congruent based on knowledge of the special angles created when parallel lines are cut by a transversal. [4:08]
Khan Academy
Khan Academy: Geometry: Proof: Diagonals of Parallelogram Bisect Each Other
Demonstrates how to prove that the diagonals of a parallelogram bisect each other based on knowledge of the special angles created when parallel lines are cut by a transversal and the triangle congruency postulates. [9:06]
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: Kites as a Geometric Shape
Sal discusses a special type of quadrilateral, the kite.
Sophia Learning
Sophia: Double Diagonals of a Parallelogram: Lesson 4
This lesson cover the concept that that when both diagonals are drawn in on a parallelogram, two pairs of congruent triangles are formed. It is 4 of 5 in the series titled "Double Diagonals of a Parallelogram."
Sophia Learning
Sophia: Double Diagonals of a Parallelogram: Lesson 1
This lesson cover the concept that that when both diagonals are drawn in on a parallelogram, two pairs of congruent triangles are formed. It is 1 of 5 in the series titled "Double Diagonals of a Parallelogram."