Curated OER
Plain Figures and Measuring Figures
Students investigate basic geometric concepts. In this geometry lesson, students explore solids through measuring and modeling. This assignment models the importance of understanding concrete objects in geometry.
Curated OER
Making Pictures from Smaller Shapes
Students investigate shapes. In this dimension and orientation of shapes lesson, students identify and color shapes, use shape stamps to form animals, glue shapes together to make other objects and describe how shapes are used.
Curated OER
Inscribed Angles
Students analyze inscribed angles and intercepted arcs and explore the relationships between the two. They investigate the properties of angles, arcs, chords, tangents, and secants to solve problems involving circles.
Curated OER
Geometry Scavenger Hunt
Learners use the digital camera, identify geometric shapes (in nature as well as man-made), and gain a better understanding of geometric vocabulary. They search for and recognize geometric shapes in unusual settings
Curated OER
Polygons All Around Us!
Students explore the concept of polygon properties. In this polygon properties lesson plan, students draw polygons with different numbers of sides such as pentagons, octagons, hexagons, etc. Students identify different geometric shapes...
Curated OER
Teaching the Tr'panier Trapezoid Kite
Students analyze how the parts of a system go together and how these parts depend on each other. They comprehend the forces in terms of strength and direction. Students observe, measure and describe weather indicators.
Curated OER
Geo-Folder
Second graders create a Geo-Folder based on geometric terms and concepts. They make a Table of Contents that guides them through the process of assembling a folder of completed activities.
Curated OER
Geo Jammin' By DeSign - Day 2, Lesson 7: Start At Square One
Students examine new shape possibilities by combining two and four triangles using manipulatives.
Curated OER
Angles Lesson Plan
Students stud angles, and then play the "What's Your Angle?" game. They complete at least 10 computer generated problems from the Angles Applet.
Curated OER
Environmental Education/Water Pollution
Fifth graders play a game in which they list as many environmental issues or terms in alphabetical order. They brainstorm ways they can save the environment and create a mural that displayed research found from the internet and Encarta.
Curated OER
Tangram Perimeters
Young scholars work together to make figures out of tangram squares. In groups, they calculate the measurements they need and apply the Pythagorean Theorem. They complete a worksheet solving equations using the theorem and review their...
Curated OER
Plain Figures And Measuring Figures
Seventh graders investigate the mathematical concept of a sector. They apply the concept to an example problem and then move into a more complex application. They find the area of the side of a cone. This is done as students calculate...
Math Open Reference
Math Open Reference: Congruent Triangles
A complete reference guide to congruent triangles. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Texas Instruments
Texas Instruments: Sas Triangle Congruence
This activity will help students visualize the construction of congruent triangles and conceptualize properties through measurement and movement of their construction. Students will need access to the TI-84 Plus Family.
Texas Instruments
Texas Instruments: Investigate Triangles and Congruence
Learners can use the TI-84 Plus family with Cabri Jr. to prove triangle congruence with SSA.
Texas Instruments
Texas Instruments: Asa Triangle Congruence
Students construct and analyze triangles that are congruent by ASA.
Oswego City School District
Regents Exam Prep Center: Copy a Line Segment and an Angle
This site provides a step-by-step method to construct congruent segments and angles with a straight edge and compass.
Texas Instruments
Texas Instruments: Got Parallel Lines With Corresponding Angles Congruent? With
Construct parallel lines in Cabri Jr., and students label and check if all corresponding angles are congruent.
ClassFlow
Class Flow: Compass Constructions
[Free Registration/Login Required] This flipchart provides the basic step-by-step guidance for making congruent constructions using a compass and a ruler.
Depaul University
Depaul University: Inscribing Regular Polygons
In this lesson, students learn to inscribe regular polygons inside a circle.
University of Cambridge
University of Cambridge: Nrich: Seven Sticks
On this one page website sharpen your logic, triangle properties, and pattern recognition skills while working on this challenge. The solution is available to double check your solution.
Illustrative Mathematics
Illustrative Mathematics: G Srt Folding a Square Into Thirds
The goal of this task is to apply knowledge about similar triangles in order to understand an origami construction: trisection of the side of a square. Aligns with G-SRT.B.5.
Texas Instruments
Texas Instruments: Isosceles Triangle
In this activity, students construct isosceles and equilateral triangles. They discover that if two sides of a triangle are congruent, then the angles opposite them are congruent. They understand that an equilateral triangle is also...
Texas Instruments
Texas Instruments: Exterior Angle and Side Angle Relationships
This activity will help students visualize the relationships that arise when some of the congruence conditions are true but one is not. The interactive nature of their constructions will permit them to explore these relationships in a...