Curated OER
Properties of a Quadrilateral
In this geometry worksheet, 10th graders use coordinate geometry to examine the lengths, slopes, and midpoints of the diagonals of the different quadrilaterals in order to arrive at conclusions regarding the properties of the diagonals....
Curated OER
Diagonals of Quadrilaterals
Students find the diagonals of the quadrilaterals. In this geometry lesson, students identify and use properties of quadrilaterals. They define different parts of a quadrilateral shape.
Curated OER
Incenter of a Triangle
Tenth graders find the incenter of a triangle. In this geometry lesson, 10th graders define the way to create an incenter with an angle bisector. They differentiate between incenter and incircle.
Curated OER
N Equal Parts by Construction
Students experiment with straight edges and compasses to divide lengths into equal parts. They identify different fractions of the total length.
Curated OER
Saving the Past for the Future
Young scholars review web images to identify human impact on nature and site destruction.
Curated OER
Geometry, Word Search Puzzle
In this math worksheet, students look for the words that are related to the math words used in the practice of geometry. They also practice spelling.
Curated OER
Polygons All Around Us!
Students explore the concept of polygon properties. For this polygon properties lesson, students draw polygons with different numbers of sides such as pentagons, octagons, hexagons, etc. Students identify different geometric shapes in...
Curated OER
Origami Frogs
Ninth graders explore a variety of geometry and science concept while making an origami frog. The fold paper into the shape of a frog and conduct measurement activities including frog leaps.
CK-12 Foundation
Ck 12: Geometry: Lines and Angles Study Guide
This study guide on lines and angles covers key terminology; line notation; parallel, perpendicular, and skew lines; and postulates and theorems about lines. It is available for download with free registration.
Math Open Reference
Math Open Reference: Perpendicular Bisector
Learn about the perpendicular bisector with this handy reference guide. Provides a detailed definition, examples, and an interactive activity that enhances further explanation.
Analyze Math
Analyze Math: Perpendicular Bisector
Learners explore the definitions and properties of the perpendicular bisector. The interactive activity includes an applet to explore the properties of the perpendicular bisector.
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.
Oswego City School District
Regents Exam Prep Center: Bisect a Line Segment and an Angle
This step-by-step tutorial teaches students how to construct a bisector of a segment and the bisector of an angle.
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.
Mocomi & Anibrain Digital Technologies
Mocomi: Perpendicular Bisector: Definition & Theorem
Explains how to draw a perpendicular bisector and provides a definition of the perpendicular bisector theorem.
Illustrative Mathematics
Illustrative Mathematics: G Co Angle Bisection and Midpoints of Line Segments
This task provides a construction of the angle bisector of an angle by reducing it to the bisection of an angle to finding the midpoint of a line segment. Aligns with G-CO.D.12.
Texas Instruments
Texas Instruments: Perpendicular Bisector of a Line Segment
Students learn to draw a segment and its perpendicular bisector. They understand right angles and congruent segments. Students observe that changing the length or orientation of the segment changes the perpendicular bisector.
Wolfram Research
Wolfram Math World: Perpendicular Bisector
MathWorld's definition of a perpendicular bisector, with illustrations to show the different uses of the perpendicular bisector.
Illustrative Mathematics
Illustrative Mathematics: G Co Construction of Perpendicular Bisector
A and B are two distinct points in the plane and line AB is the segment joining them. The goal of this problem is to construct the perpendicular bisector of segment AB. Aligns with G-CO.D.12.
Mangahigh
Mangahigh: Shape: Construct Bisectors and Other Lines
Test your knowledge of construting bisectors on lines.
Sophia Learning
Sophia: Midpoint vs. Segment Bisector: Lesson 7
This lesson defines midpoint and segment bisector, and provides examples that demonstrate how to distinguish between the two. It is 7 of 10 in the series titled "Midpoint vs. Segment Bisector."
Math Is Fun
Math Is Fun: Definition of Bisector
A clear definition and drawing of a bisector, a line that divides one angle into two.
Math Open Reference
Math Open Reference: Line Segment Bisector
Learn about line segment bisectors 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: Midpoint of a Line Segment
Learn about the midpoint of a line segment with this helpful reference tool. Provides a detailed definition and an interactive activity that enhance further explanation. Includes links to related topics.