Pupils review the vocabulary, formulas, and postulates from the opening unit in Geometry. Individuals use these to solve a problem set that requires learners to apply algebraic skills along with providing reasons within a proof. Scholars...

An informative presentation shows pupils how to name and measure angles. Scholars revisit the different types of angles and their definitions and use their knowledge of what an angle bisector is to solve algebraic problems. At the end,...

Geometry is more than just vocabulary. Pupils learn the basic geometric definitions and how to identify and name points, lines, and planes. Though the first lesson is packed with related vocabulary, scholars experience four postulates...

Light can be a mysterious phenomenon. Take away some of the mystery with an intriguing video lesson. The 38th lesson of the Crash Course physics series studies the movement of light waves. Topics include refraction and reflection as well...

Geometry begins with a point. The video introduces the concepts of points, lines, and planes. Using diagrams, the presenter includes how to name the objects along with how to write the names. Previewing the concept of 3-D space ends the...

Mathematicians use notation for efficiency, so make your classes more efficient! The instructor explains the definition and notation for key elements of geometry such as points, lines, and planes. This is the 37th lesson is a series of...

An informative lesson begins with a concept video explaining how radians are figured. Then it offers videos of four progressively difficult guided practice problems.

An angle is formed when two rays share a common endpoint. Want to know more about angles? There are a lot of terms in this lesson. You might have to watch it two or even three times to make sure you understand all the terms. I recommend...

An angle is formed when two rays share a common endpoint. Want to know more about angles? There are a lot of terms in this lesson. You might have to watch it two or even three times to make sure you understand all the terms. I recommend...

A ray is a line that begins at an identified point and then goes on forever in one direction. The identified point is called the endpoint. There needs to be another identified point on the line to be able to identify the line as a ray....

Neil deGrasse Tyson, director of the Hayden Planetarium, identified the phenomenon where the sun lines up for spectacular views in New York over a decade ago and coined it Manhattanhenge. Watch this cosmic event unfold right through the...

In this video students learn about the key aspects of rays.

Take a look at this tutorial to learn about how an angle is formed, how to name an angle, and how an angle is measured. [4:45]

Who do we have to thank for inventing calculus? Whether you love or hate it, the credit goes to two people - Sir Isaac Newton and Gottfried Wilhelm von Leibniz. Learn about their myriad of accomplishments in science and math during the...

This lesson will show you the tools and procedures involved in drawing and labeling a ray. It is 3 of 8 in the series titled "Drawing a Ray."

This lesson will show you the tools and procedures involved in drawing and labeling a ray. It is 5 of 8 in the series titled "Drawing a Ray."

This lesson will show you the tools and procedures involved in drawing and labeling a ray. It is 7 of 8 in the series titled "Drawing a Ray."

This lesson will show you the tools and procedures involved in drawing and labeling a ray. It is 2 of 8 in the series titled "Drawing a Ray."

This lesson will show you the tools and procedures involved in drawing and labeling a ray. It is 6 of 8 in the series titled "Drawing a Ray."

This lesson will show you the tools and procedures involved in drawing and labeling a ray.

Academy biologist Brooke provides a behind the scenes look at freshwater stingrays (Potamotrygon species). These stingrays typically inhabit fresh waters of South America and diet on fishes and small invertebrates. Like their saltwater...