Geometry

Geometry (X)

Volume of Right Rectangular Prisms

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Learn how unit cubes can be used to model the solution for the volume of a 3D figure This video focuses on calculating the volume of a rectangular prism using the equation, length x width x height. This video was submitted through the Innovation Math Challenge, a contest open to professional and nonprofessional producers.

Calculating Where Lines Intersect

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Learn how algebra can quickly determine the point where two lines intersect. This video focuses on setting linear equations equal to each other to find a common solution.

This video was submitted through the Innovation Math Challenge, a contest open to professional and nonprofessional producers and is part of the Math at the Core: Middle School collection.

Human Tree: Dilations

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Watch as the National Museum of Mathematics uses an image of a visitor to create a "Human Tree" using dilations. This video focuses on how similar figures can create dilations and how exponents can be used in an equation to express the proportional relationship in fractals. This video was submitted through the Innovation Math Challenge, a contest open to professional and nonprofessional producers.

Human Tree: Ratios

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Watch as the National Museum of Mathematics creates an interesting series of images using ratios. This video focuses on the proportional relationship observed in fractals and challenges you to do some critical thinking using ratios and scale factors. This video was submitted through the Innovation Math Challenge, a contest open to professional and nonprofessional producers.

Candy Volume

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Estimate the volume you get when you fill 3D shapes with candy. This video focuses on estimating volume using nonstandard units, using the volume equation to get a more reliable estimate and checking your estimate by counting the nonstandard units. This video was submitted through the Innovation Math Challenge, a contest open to professional and nonprofessional producers.

Rubik's Cube Volume

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Revealing multiple ways to find volume using a Rubik's cube. This video focuses on modeling volume and explaining why two different volume equations will give you the same answer.

This video was submitted through the Innovation Math Challenge, a contest open to professional and nonprofessional producers and is part of the Math at the Core: Middle School collection.

Nets

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Learn how you can use a net to form a three-dimensional (3D) shape and to find the surface area of the shape in this video from KCPT.

Beating Usain Bolt

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Use mathematics to determine what is required to beat world champion Usain Bolt in a 200-meter race. This video focuses on systems of equations that are visualized by completing a table of values and looking for a point of intersection in a set of line graphs. This video was submitted through the Innovation Math Challenge, a contest open to professional and nonprofessional producers.

This resource is part of the Math at the Core: Middle School collection.

Dangle Angle | STEM Alive

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An inclinometer, for measuring unreachable heights and more! This easily made sighting device can measure the angles of lines of sight. Students will gain hands-on insight into understanding and measuring different angles.

Area of a Triangle

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Watch Geometry Gal explain how to find the area of a triangle, comparing the formula for the area of this two-dimensional shape to that of a quadrilateral, in this video from KCPT.

Volume of a Polyhedron

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In this video, learn how to calculate the volume of a polyhedron by determining the base and then watching the space inside fill in order to determine the height. In the accompanying classroom activity, students calculate the volume of mini cereal boxes, in this video from KCPT.

Real-Life Math | Zoo Keeper, Hoofstock

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In this video, zookeeper Michelle Hatwood of the Phoenix Zoo explains how she uses math in her work with hoofstock animals, which include antelope, deer, zebra, giraffe, and rhinoceros. In the accompanying classroom activity, students solve problems that involve calculating with and converting among metric and customary measurement units. To get the most from this lesson, students should be familiar with measurement units in the customary and metric systems and be able to use a calculator to multiply and divide decimal numbers.

West Virginia | Pipefitter and the Pythagorean Theorem

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An apprentice pipefitter explains how he uses math and science in his every day work tasks in this video for WV Steam.

Directions to Hen Rock

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In this video segment from Cyberchase, the CyberSquad follows a treasure map with riddles to find Ivanka the Invincible’s secret treasure chest. One of the riddles asks the CyberSquad to record how much of a turn they make from one object to another. To do this, they have to record the angle of the turn.

Measuring for an Exact Fit

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In this Cyberchase video segment, Matt and Jackie must figure out how to construct rectangular lids that match the size of two boxes precisely. They enlist the carpentry skills of one of the Three Little Pigs, who shows them how to use different tools to accurately measure the rectangular lids. For the first box, Jackie finds that she can easily trace the box to make a lid that fits perfectly. The second box cannot be traced, so Matt and Jackie decide to measure the sides of the box and then use the measurements to cut a rectangle of equal size out of a piece of Herculanium.