Curated OER
What is a Rhombus?
A closed figure with four sides means it's a quadrilateral. Each of the different types of quadrilaterals have special properties. The instructor in this video explains the special properties of a rhombus. Parallel sides and congruent...
Curated OER
What is a Regular Polygon?
What makes a polygon a regular polygon? Does this mean there are irregular polygons? For a polygon to be classified as a regular polygon, all the sides must be congruent and all the angles must be congruent. Those are the two rules that...
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
What is a Pyramid?
One base, triangular sides, and defined polygons are all parts of what make up a pyramid. Check out this video and see the instructor draw pictures of a variety of pyramids. She identifies the specific parts and gives them names based on...
Curated OER
How Do You Find the Area of a Rectangle Whose Sides are Binomials?
The teacher uses a diagram to set up her initial equation to reflect the changes being made to a garden plot. She has a good explanation of how she got her equation. Then she works through the steps to solve the equation.
Curated OER
Types of Polygons - Geometry Help
If it has three sides it's a triangle! Learn about the different types of polygons and how they are classified by the number of sides they have. This clip clearly defines each type of polygon, but fails to show examples.
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....
Virtual Nerd
How Do You Solve a Radical Equation?
Oh my, there's a variable inside the radical . How will you ever solve this one? The teacher explains step-by-step just how to solve this radical equation. She also shows how to check to make sure the answer is the correct one.
Curated OER
How Do You Find the Area of a Rectangle Whose Sides are a Monomial and a Polynomial?
Yes, it's a real-world word problem, but it's as easy as multiplying a monomial and a polynomial. Then all you have to do is to make sure you write it in simplest form.
Curated OER
How Do You Solve a Word Problem by Multiplying Trinomials?
Use the distributive property to multiply these two trinomials. Then combine all the like terms and make sure to write them in descending order by degrees.
Math Mammoth
Math Mammoth: Polygons: Introduction
An introduction to different types of polygons and how to combine or deconstruct polygonal shapes. [5:45]
Khan Academy
Khan Academy: Classifying Shapes by Lines and Angles
Demonstrates how to find what 2D shape matches a set of properties. [3:37]
Khan Academy
Khan Academy: Classifying Triangles
Discusses the different types of triangles and their angles. [6:00]
Khan Academy
Khan Academy: Recognizing Shapes
Discusses how to identify basic 2D shapes by their properties. [6:08]
Khan Academy
Khan Academy: Cousin Fal's Shape Collection
Looks at a collection of 2D shapes and discusses how to identify them based on their properties. [4:19]
Khan Academy
Khan Academy: Intro to Quadrilateral
A detailed introduction to quadrilaterals, the different types, and the vocabulary used to discuss their properties and to classify them. [8:24]
Khan Academy
Khan Academy: Quadrilateral Properties
Discusses the properties of different types of quadrilaterals. [5:07]
Khan Academy
Khan Academy: Recognizing Shapes
Learn the names of different shapes and how to recognize them. [6:08]
CK-12 Foundation
Ck 12: Elem Math: Overview of Rectangles Squares Circles and Triangles
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of rectangles, squares, circles and triangles.
CK-12 Foundation
Ck 12: Elem Math: Overview of Squares and Rectangles
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of squares and rectangles.
Khan Academy
Khan Academy: Worked Examples: Geometry: Geometry: Triangles and Parallelograms
Students explore the properties of triangles and parallelograms in this video tutorial.
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.