Curated OER
Vertical Angles
With a clean, direct resource like this one, learners can easily focus on the task at hand, which is clearly communicated. They practice figuring the missing measures of vertical angles given the measure of their complement or...
Curated OER
Easy Worksheet: Name the Property - Congruent Angles and Segments
In this name the property worksheet, students solve 10 short answer problems. Students identify the property illustrated by the given statements about congruent angles and segments.
Curated OER
Indirect Measurement with Similar Triangles
Students use similar triangles to find missing heights. In this using similar triangles to find missing heights lesson plan, students use proportions to find the heights of missing side lengths. Students find the height of trees and...
Curated OER
Angles Formed By Parallel Lines
Young scholars explore the concept of angles formed by parallel lines.They graph two parallel lines cut by a transversal, then measure the angles formed by the transversal and record the data in a table. Learners make conjectures about...
Curated OER
Proofs Chapter 2: Geometry
In this geometry worksheet, students look at given pictures and prove congruent lines and angles. This three-page worksheet contains nine multi-step problems.
Curated OER
Geometric Proofs
In this geometric proofs worksheet, students prove supplementary, complimentary, and congruent angles from given models and information. This four-page worksheet contains six multi-step problems.
Oswego City School District
Regents Exam Prep Center: Geometry Vocabulary Resources
A list of geometry definitions and a matching activity.
Math.com
Math.com: Building Blocks: Classifying Angles
This geometry resource investigates types of angles. Definitions, detailed examples, and practice problems are included.
Texas Instruments
Texas Instruments: Finding the Shortest Path
Students discover the shortest distance light travels from an object to the human eye, as the light from the object reflects off a single mirror. In the process they learn about reflection in a line, congruent angles, angle bisectors,...
Texas Instruments
Texas Instruments: Math Today Ballooning Inside the Box
In this activity Using the USATODAY infograph, "Ballooning inside the box", students will explore geometric relationships using similar triangles. Identifying triangles with two pairs of congruent angles to explore similarity properties...
CK-12 Foundation
Ck 12: Congruent Angles and Angle Bisectors
[Free Registration/Login Required] Students explore the concept of congruent angles and angle bisectors by navigating through the interactive learning module and then answering questions that go along with the module. Students can also...
CK-12 Foundation
Ck 12: Congruent Angles and Angle Bisectors
[Free Registration/Login Required] Students explore congruent angles and angle bisectors through the interactive learning module and then answering questions that go along with the module. Students can also learn more about the concept...
CK-12 Foundation
Ck 12: Vertical Angles
[Free Registration/Login Required] Students explore the concept of vertical angles by navigating through the interactive learning module and then answering questions that go along with the module.
CK-12 Foundation
Ck 12: Corresponding Angles
[Free Registration/Login Required] Students explore the concept of corresponding angles by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more about...
CK-12 Foundation
Ck 12: Corresponding Angles
[Free Registration/Login Required] Students explore the concept of corresponding angles by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more about...
Illustrative Mathematics
Illustrative Mathematics: G Srt Joining Two Midpoints of Sides of a Triangle
In this task, students must prove that angles and triangles are congruent and that a parallel line passes through the midpoints of two sides of the larger triangle. Aligns with G-SRT.B.4.
Illustrative Mathematics
Illustrative Mathematics: 8.g Congruence of Alternate Interior Angles
Eighth graders are presented with a labeled drawing of two parallel lines intersected by a transversal line. They are asked to discuss congruency of angles when the picture is rotated about a point on the transversal. Aligns with 8.G.A.5.
Purple Math
Purplemath: Conventions
A "convention" is "just the way a thing is done!". This reference material lists some common conventions (notational assumptions) for geometry and trigonometry.
Math Open Reference
Math Open Reference: Congruence
A complete reference guide to congruence including congruent triangles and polygons. It provides definitions, animation, and interactive activities that enhance further explanation.
Math Planet
Math Planet: Geometry: Measure and Classify an Angle
Explains the terms and symbols used to discuss line angles, what an angle is, and the types of angles. Includes short video lesson demonstrating how to use a protractor to measure an angle. [0:57]
CK-12 Foundation
Ck 12: Geometry: Congruent Angles and Angle Bisectors
[Free Registration/Login may be required to access all resource tools.] This concept introduces students to angles, congruent angles, and angle bisectors. Students examine guided notes, review guided practice, watch instructional videos...
CK-12 Foundation
Ck 12: Geometry: Congruent Angles and Angle Bisectors
[Free Registration/Login may be required to access all resource tools.] In this lesson students apply the definitions of angle congruency and angle bisector. Students examine guided notes, review guided practice, watch instructional...
CK-12 Foundation
Ck 12: Geometry: Angles Study Guide
This study guide on angles covers key vocabulary, ways to name angles, how to measure them, the Protractor Postulate and the Angle Addition Postulate, types of angles, congruent angles, angle bisectors, and angle pairs. It is available...
Math Open Reference
Math Open Reference: Congruent Angles
Learn about congruent angles with this handy reference guide. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.