Illustrative Mathematics
Illustrative Mathematics: G Gpe Scaling a Triangle in the Coordinate Plane
The goal of this task is to apply dilations to a triangle in the coordinate plane. Students will need to find the coordinates of a point which cuts a given segment into one third and into two thirds. The two dilated triangles share a...
CK-12 Foundation
Ck 12: 10.6 Points That Partition Line Segments
[Free Registration/Login may be required to access all resource tools.] Determine the formula for finding the coordinates of a point on a line segment.
CK-12 Foundation
Ck 12: Geometry: Segments Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide reviews how to measure the distance between two points and the Ruler Postulate. It also introduces congruency/congruent segments and midpoint.
CK-12 Foundation
Ck 12: Geometry: Midpoints and Segment Bisectors
[Free Registration/Login may be required to access all resource tools.] Apply the definitions of midpoint, segment bisector, and angle bisector.
CK-12 Foundation
Ck 12: Geometry: Midpoints and Segment Bisectors
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to calculate midpoints and use the definitions of segment bisectors and perpendicular bisectors.
Mathigon
Mathigon: Geometry: Euclidean Geometry: Definitions
This lesson focuses on Euclidean Geometry terminology; such as line, point, line segment, congruence, circle, radius, ray, and more. It defines each term and provides an example of each.
CK-12 Foundation
Ck 12: Geometry: Basics of Geometry Study Guide
This study guide on Geometry covers some key vocabulary, drawing and labeling diagrams, describing geometric figures, and basic postulates for points, lines, planes, and intersections. It is available for download with free registration.
Math Open Reference
Math Open Reference: Line Segment
Learn about line segments with this useful reference guide. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Math Open Reference
Math Open Reference: Introduction to Coordinate Geometry
A complete reference guide to coordinate geometry. It provides definitions and examples that enhance further explanation. Includes links to related topics.
Cuemath
Cuemath: Midpoint Theorem
A comprehensive guide for learning all about plane shapes with definitions and solved examples.
Math Open Reference
Math Open Reference: Congruent Line Segments
Learn about congruent line segments with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Math Open Reference
Math Open Reference: Point
A complete reference guide to points. It provides definitions and an interactive activity that enhances further explanation. Includes links to related topics.
Khan Academy
Khan Academy: Divide Line Segments
Figure out the coordinates of a point between two other points that give a certain ratio. For example, find a point C so that it is two thirds of the way between point A and B.
CK-12 Foundation
Ck 12: Interactive Geometry: 11.1 Descriptions of Events
In a coordinate proof, geometric statements using algebra and the coordinate plane.
CK-12 Foundation
Ck 12: Interactive Geometry: 10.6 Points That Partition Line Segments
Understand points that partition line segments.
CK-12 Foundation
Ck 12: Interactive Geometry: 5.2 Bisectors of Line Segments and Angles
Learn how to construct bisectors of line segments and angles.
CK-12 Foundation
Ck 12: Interactive Geometry: 5.1 Copies of Line Segments and Angles
Construct a copy of a line segment in this interactive exercise.
Free Math Help
Free Math Help: Geometry Vocabulary
The tutorial examines basic geometry vocabulary. Definitions and examples of a point, line, line segment, ray, and plane are included.
University of Toronto (Canada)
University of Toronto: Why the Midpoint Formula Works
A written proof that shows how the midpoint formula works.
Wolfram Research
Wolfram Math World: Line Segment
This site contains a definition of a line segment. Includes a graphic and links to related sites.
Wolfram Research
Wolfram Math World: Collinear
This MathWorld site explains what it means to be collinear, and explains a test to see if three points are collinear using ratios of distances of the points' parts. The site also gives another method of determining collinearity between...
Wolfram Research
Wolfram Math World: Locus
This site defines the term "locus" as it is used in mathematics and gives an example of the locus as a set of points equal distance from a point in two and three dimensional space.
Sophia Learning
Sophia: Segment Bisectors Problems: Lesson 1
This lesson will demonstrate how to solve for unknown variables and segment lengths in problems that involve midpoint and segment bisectors. It is 1 of 5 in the series titled "Segment Bisectors Problems."
Sophia Learning
Sophia: Coordinate Geometry of Parallelograms: Lesson 1
This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a parallelogram in a coordinate plane. It is 1 of 6 in the series titled "Coordinate...