[Free Registration/Login Required] Classify angles by their side and angles. Find angles and measure in triangles.

[Free Registration/Login Required] This flipchart shows the basic relationships between trig functions and the sides and angles of a right triangle.

[Free Registration/Login Required] This elementary flipchart presents the concept of regular shapes and ways of measuring perimeter. It also explores the ratio of perimeter to side length that equals the number of sides.

[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...

[Free Registration/Login Required] This flipchart is a simple diagram showing the sides and triangles in a polygon.

[Free Registration/Login Required] This flipchart defines and uses the law of cosines to find the missing sides and angles of oblique triangles.

[Free Registration/Login Required] This flipchart helps students to analyze and compare various two-dimensional shapes according to the vertices, sides and parallel lines. It features "containers" created in Version 3 (can be used with...

[Free Registration/Login Required] Explore the world of polygons. Review the different types of polygons and quadrilaterals. Practice counting angles and sides. Identify specific polygons and create your own polygons.

[Free Registration/Login Required] This flipchart provides a review of circle, rectangle, square, triangle, and hexagon and introduces trapezoid and rhombus. Students are asked to identify the number of sides and the number of corners of...

[Free Registration/Login Required] This flipchart can be used as a review or for instruction of the events, sides, famous leaders, and theaters of World War II.

[Free Registration/Login Required] This lesson covers methods of classifying triangles, both according to the length of their sides and by the measure of their interior angle.

[Free Registration/Login Required] In this lesson students are introduced to regular polygons. Students learn how to find the drawing angle of any given polygon, exterior angle, interior angle and the sum of the angles for a regular...

[Free Registration/Login Required] This lesson helps teach congrence in triangles. Includes practice with postulates, theorems, and logical reasoning.

[Free Registration/Login Required] Students will explore polygons.

[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.]

[Free Registration/Login Required] Here are many variations of congruent triangles displayed for students to test their knowledge.