Curated OER
Perimeter Play
Fifth graders identify that the perimeter of a shape is the sum of its sides.
Students cut some string or rope to make the sides of a rectangle. Students write the measurement of the length of the rectangle and the measurement of the...
Curated OER
Polygons
Second graders view a PowerPoint presentation on Identifying Polygons by their number of sides and their individual properties. They separate polygon tiles into groups by their attributes.
Beacon Learning Center
Beacon Learning Center: The Facts Please, Mr. Mumble
This interactive web lesson teaches students about two-dimensional shape attributes.
CK-12 Foundation
Ck 12: Elem Math: Counting Vertices and Sides in Various Shapes
[Free Registration/Login may be required to access all resource tools.] This resource is practice problems where students determine the number of sides or vertices in given polygons.
![Pbs Mathline Lesson Plan: Struts'n Stuff [Pdf] Lesson Plan](https://static.lp.lexp.cloud/images/attachment_defaults/resource/large/FPO-knovation.png "Pbs Mathline Lesson Plan: Struts'n Stuff [Pdf] Lesson Plan")
PBS
Pbs Mathline Lesson Plan: Struts'n Stuff [Pdf]
Incorporating concepts in algebra, number sense, patterning, data collection, and geometry, this lesson engages young scholars in various hands-on activities to explore the relationship between regular polygons and the number of...
CK-12 Foundation
Ck 12: Elem Math: Counting Vertices and Sides in Various Shapes
[Free Registration/Login may be required to access all resource tools.] Students practice counting sides and vertices in various two dimensional shapes.
CK-12 Foundation
Ck 12: Interactive Geometry: 3.5 Applications of Congruent Triangles
Learn how two triangles are congruent if and only if their corresponding sides and corresponding angles are congruent.
CK-12 Foundation
Ck 12: Interactive Geometry: 1.5 Quadrilaterals
Explore and measure a variety of quadrilaterals.
Other
Trigonometry: A Quick Review
This site is a personal site from David Eisenberg and it contains brief but great review information for trigonometry. This particular site focuses on sine and cosine inlcuding a small circle graph. Clicking on the index link provides...
ClassFlow
Class Flow: Triangles and Angles
[Free Registration/Login Required] Classify angles by their side and angles. Find angles and measure in triangles.
ClassFlow
Class Flow: Trigonometry
[Free Registration/Login Required] Students explore trigonometric functions using the interactive features of Activstudio. Students apply their understanding of trigonometric sense to determine the side lengths and angles of various...
ClassFlow
Class Flow: Basic Right Triangle Trigonometry
[Free Registration/Login Required] This flipchart shows the basic relationships between trig functions and the sides and angles of a right triangle.
ClassFlow
Class Flow: Braun Polygons
[Free Registration/Login Required] This flipchart is a simple diagram showing the sides and triangles in a polygon.
ClassFlow
Class Flow: Braun Right Triangles
[Free Registration/Login Required] This lesson is an exploration of variations of right triangles. Use as a warm up on square roots introduced in this flipchart. [Requires Adobe Reader.]
ClassFlow
Class Flow: Congruency
[Free Registration/Login Required] Here are many variations of congruent triangles displayed for students to test their knowledge.