Curated OER
What is a Rectangle?
What are the characteristics and properties of a quadrilateral that make it a rectangle? Four sides? Right angles? Parallel sides? Watch this video and follow along as the instructor explains the terms and properties that make a...
Curated OER
What is a Quadrilateral?
What's so special about quadrilaterals? There are five special types, yes, five. Can you name them? The instructor in this video diagrams and illustrates the special types of quadrilaterals and explains what makes each one special.
Curated OER
What is a Parallelogram?
A rectangle, a rhombus, a square, a trapezoid - are any of these a parallelogram? What are the criteria that make a shape a parallelogram? It has something to do with parallel sides, congruent sides, and congruent angles. Help your young...
Curated OER
How Do You Classify Quadrilaterals?
A rectangle, a rhombus, a square, a trapezoid, and a parallelogram, are these quadrilaterals? What are the criteria that make and shape a quadrilateral? It has something to do with parallel sides, congruent sides, and congruent angles....
Khan Academy
Khan Academy: Geometry: Quadrilateral Properties
This video tutorial [5:07] demonstrates how to use the basic properties of parallelograms, rectangles, squares, rhombi, and trapezoids to determine what are the possible ways to name a given geometric shape.
Khan Academy
Khan Academy: Quadrilateral Overview
This video tutorial [8:24] defines what a quadrilateral is and identifies and defines concave quadrilaterals, convex quadrilaterals, trapezoids, parallelgrams, rectangles, rhombi, and squares.
Khan Academy
Khan Academy: Geometry: Ca Geometry: Deducing Angle Measures
Demonstrates how to solve five different problems from a released California Geometry state test that involve finding the measures of angles in different polygons. This video also appears in the Geometry: Worked Examples section. [10:58]
Khan Academy
Khan Academy: Geometry: Area of a Parallelogram
Demonstrates how to derive the formula for the area of parallelogram based on the area formula for a triangle. [5:42]
Virtual Nerd
Virtual Nerd: How Do You Find the Area of a Parallelogram?
If you know the length of the base and height, it's easy to find the area of a parallelogram. This tutorial walks you the process of solving for area. [4:38]
Virtual Nerd
Virtual Nerd: What Is a Rectangle?
Tutorial provides an introduction to rectangles and explains their special properties. [5:56]
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.