Be Smart
Measuring the Universe With a 14-Billion Light-Year Ruler
New ReviewSince the time of the ancient Greeks, scientists have been constructing a cosmic measuring tape to measure the universe from our own backyard all the way to its ever-expanding edge: the cosmic distance ladder. In this video, we climb...
Math Fortress
Geometry: Beginning Proofs (Level 1 of 3) | Algebra Proofs, Geometric Proofs
In this video we will learn how to write simple two-column proofs. We will first cover algebraic proofs, then we will go over the elements of an axiomatic system, the video ends with an introduction to geometric proofs.
Brian McLogan
Finding the volume and surface area of a pyramid with a rectangular base
👉 Learn how to find the volume and the surface area of a pyramid. A pyramid is a 3-dimensional object having a polygon as its base and triangular surfaces converging at a single point called its apex. A pyramid derives its name from the...
Brian McLogan
How to find the surface area of a cone flipped upside down
👉 Learn how to find the volume and the surface area of a cone. A cone is a 3-dimensional object having a circular base and round surface converging at a single point called its vertex (or apex). The vertical distance from the circular...
Brian McLogan
Learn how to determine the surface area of a pyramid
👉 Learn how to find the volume and the surface area of a pyramid. A pyramid is a 3-dimensional object having a polygon as its base and triangular surfaces converging at a single point called its apex. A pyramid derives its name from the...
Brian McLogan
How to find the volume or a triangular prism
👉 Learn how to find the volume and the surface area of a prism. A prism is a 3-dimensional object having congruent polygons as its bases and the bases are joined by a set of parallelograms. A prism derives its name from the shape of its...
Brian McLogan
Master How to use the segment additon postulate to find the missing length of a line
Master How to use the segment additon postulate to find the missing length of a line
Curated OER
Area of a Rectangle - Geometry Help
How on earth is one to find the area of a rectangle when he doesn't know the width? Using the diagonal of the rectangle, the length, and the Pythagorean Theorem the missing side is determined and the area is discovered. This clip is...
PBS
Pbs Kids: Super Peg and Cat Guy
Save the day with Super Peg and Cat Guy in this learning module. In order to save the day, this dynamic duo will have to use their super powers and problem solving skills to prevent bad guys from creating havoc in the city. Explore basic...