This resource is part of Tools4NCTeachers.

The goal of this lesson is for students to understand that plane figures are different from solid figures. Students will identify and locate the face of a solid figure that matches a plane figure, such as the face of a cube is a square, the base of a triangular based pyramid is a triangle.

This resource is part of Tools4NCTeachers.

In this lesson, students will create and name given shapes. They will use precise mathematical vocabulary describe shapes to partner with enough details for the partner to recreate it accurately.

This resource is part of Tools4NCTeachers.

This lesson calls for students to compose congruent hexagons using smaller pattern block pieces. They will explain which arrangements of pattern block pieces compose a congruent hexagon, and count the number of smaller pieces that compose the "bigger" shape.

An interactive applet and associated web page that introduce the concept of a triangle. The applet shows a triangle where the user can drag the vertices to reshape it. As it is being dragged a base and altitude are shown continuously changing. Demonstrates that the altitude may require the base to be extended. The text on the page lists the properties of a triangle and lists the various triangle types, with links to a definition of each. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

Definition of Angle-Angle-Side Congruence postulate, followed by image of two triangles with hotspots and question if the triangles are congruent.

Definition of Angle-Side-Angle Congruence postulate, followed by image of two triangles with hotspots and question if the triangles are congruent.

Definition of Side-Angle-Side Congruence postulate, followed by image of two triangles with hotspots and question if the triangles are congruent.

Definition of Hypotenuse-Leg Congruence postulate, followed by image of two triangles with hotspots and question if the triangles are congruent.

Definition of Side-Side-Side Congruence postulate, followed by image of two triangles with hotspots and question if the triangles are congruent.

Definition of Angle-Angle-Angle Similarity postulate, followed by image of two similar triangles, a second image with several similar triangles with hotspots.