Curated OER
Concurrent Lines in Triangles
Students explore the concept of concurrent lines in triangles. In this concurrent lines in triangles lesson, students work in groups to investigate properties of concurrent lines in acute, right, and obtuse triangles. Students use a...
Oswego City School District
Regents Exam Prep Center: Concurrence
Find resources for class instruction on concurrence: a lesson on concurrence of medians, altitudes, angle bisectors, and perpendicular bisectors complete with definitions and example diagrams; a six-question practice quiz; and...
Texas Instruments
Texas Instruments: Altitude, Median, and Angle Bisector of a Triangle
In this activity, you will construct special segments of a triangle named altitudes, medians, and angle bisectors, Using their definitions. You will look at how an altitude, a median, and an angle bisector divide the area of a triangle....
Texas Instruments
Texas Instruments: Concurrent Lines, Medians, and Altitudes With Cabri Jr.
An introduction to concurrent lines, medians, and altitudes using Cabri Jr.
Texas Instruments
Texas Instruments: Math Today Dangerous Births
In this activity, using the USA TODAY Snapshot "Dangerous births" students will explore the geometric relationships of triangles using perpendicular bisectors of the sides, bisectors of the angles and medians of the triangle. They will...
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.
Wolfram Research
Wolfram Math World: Concurrent Lines
This Math World site gives the defintion of concurrent lines and gives a test for concurrent lines using trilinear coordiantes, a link to this terminology is also contained in the site.
Math Open Reference
Math Open Reference: Concurrent Lines
Learn about concurrent lines with this helpful reference tool. Provides a detailed definition and example.