PBS
Pbs Learning Media: Finding the Intersection
In this Cyberchase video, Inez and Digit identify the location of the transformatron using their knowledge of parallel and intersecting lines.
Khan Academy
Khan Academy: Triangle Intersection in 3 D
In this seven-problem quiz/practice, students will calculate whether a point is inside a triangle in 3D.
Khan Academy
Khan Academy: Ray Intersection With Plane
In this seven-problem quiz/practice students calculate the point at which a ray intersects with a plane in three dimensions.
CK-12 Foundation
Ck 12: Geometry: Intersecting and Parallel Lines
[Free Registration/Login may be required to access all resource tools.] Identify intersecting and parallel lines.
PBS
Pbs Learning Media: Two Points Determine a Line
In this video segment [2:10] from Cyberchase, Digit must make a straight line between the two points and then follow the path created.
University of Georgia
University of Georgia: Inter Math: Intersecting Planes
This site gives a description and picture of intersecting planes. Be sure to follow the "More Information," and "Interactive Challenge," links located in the left-hand column for more information about intersecting planes.
Math Open Reference
Math Open Reference: Points and Lines
A complete reference guide to points, lines, and planes. It provides definitions and interactive activities that enhance further explanation.
Sophia Learning
Sophia: Finding Intersections: Lesson 5
This lesson demonstrates graphing two lines on a coordinate plane and determining the point where two lines intersect. It is 5 of 5 in the series titled "Finding Intersections."
Texas Instruments
Texas Instruments: Intersecting Lines and Planes
In these problems, students are asked to find: point of intersection of two lines; coefficients that make two lines parallel; intersection of diagonals of a quadrilateral; and the point of intersection of three planes.
University of Georgia
University of Georgia: Inter Math: Intersection of Sets
This site gives a description of intersection of sets along with an example. There are links to related terms, challenging problems, more information, and the interactive check point involving set intersections located in the left-hand...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Intersecting Angles
This site from The Math Forum of Drexel University provides a question posed by a students with a response. The question involves the points of intersection of two intersecting angles.
University of Regina (Canada)
University of Regina: Math Central: Introduction to Slope for Middle Years Mathematics
This collection of five middle school math lessons covers the topic of plane geometry, specifically the concept of slope. The first lesson introduces middle schoolers to plotting points on a Cartesian grid using a Geoboard. Lesson two...
Sophia Learning
Sophia: Finding Intersections: Lesson 2
This lesson demonstrates graphing two lines on a coordinate plane and determining the point where two lines intersect. It is 2 of 5 in the series titled "Finding Intersections."
Sophia Learning
Sophia: Finding Intersections: Lesson 3
This lesson demonstrates graphing two lines on a coordinate plane and determining the point where two lines intersect. It is 3 of 5 in the series titled "Finding Intersections."
Annenberg Foundation
Annenberg Learner: Taxicab Treasure Hunt
Find the treasure hidden at an intersection in the city. Use the clues. Read the instructions then scroll to the bottom and click "hide the treasure".
Texas Instruments
Texas Instruments: Points of Intersection and Zeros of Functions
Solve equations and find zeroes of functions using the TI-83 in this lesson. Keystroke instructions and calculator screenprints are included to help students with the activity.
Other
Desmos: Linear Systems Bundle
A collection of activities where students investigate linear systems. Activities explore their features, points that are common to a system of two linear equations, ways to express a solution, using a system to make predictions, finding...
University of Georgia
University of Georgia: Inter Math: Incenter
This InterMath site gives a description of the incenter of a triangle along with a visual representation. Be sure to follow the links to related terms, everyday examples, challenging problems, and the interactive check point involving...
Ministry of Education and Employment of Spain
Red Escolar: Intersecciones
In Spanish. This math game is for two players. The goal is to join the green points on the side of the square with a straight line and get the highest number of intersections between the drawn lines.
Texas Instruments
Texas Instruments: Sailing Through the Fog: Solving Systems of Linear Equations
Tracking equipment is used to help ship navigators traveling in dense fog determine if they are in danger of colliding with other ships that may be in the area. For this activity, we are going to assume two ships are traveling along...
Texas Instruments
Texas Instruments: Matching Quadratics Equations With Pictures!
Students will submit equations in vertex form that will match the roller coaster using activity center. They will also find the intersection point of two roller coasters.
National Council of Teachers of Mathematics
Nctm: Illuminations: Pan Balance
A pan balance helps students visualize what value for x will make two expressions equivalent. The computer applet graphs the lines and shows the intersection point.
Physics Classroom
The Physics Classroom: Image Formation for Concave Mirrors Case A
This animation depicts the path of light to each person's eye. Different people are sighting in different directions; yet each person is sighting at the same image location. In this animation the image location is the intersection point...
University of Georgia
University of Georgia: Inter Math: Orthocenter
This site from InterMath gives a description of the orthocenter of a triangle along with a visual representation. Be sure to follow the links to related terms, everyday examples, challenging problems, more information, and the...