Shodor Interactivate: Shape Explorer

Use this applet to find the perimeter of a variety of shapes with the same or different areas.

Students test their skills on how to calculate the area of a shape. Instructor notes are included.

In this lesson students will practice finding the area of rectangular shapes and irregular shapes with right angles and understand why the area formula works for rectangular shapes. CCSS.Math.Content.3.MD.C.5.b A plane figure which can...

In this lesson students will practice finding the area rectangular shapes and irregular shapes with right angles and understand why the area formula works for rectangular shapes.

In this lesson students will practice finding the perimeter of regular and irregular shapes with right angles and the appropriate units for measuring perimeter.

In this lesson students will practice finding the area of irregular shapes with right angles and understand that there are different methods for calculating area.

Practice your estimation skills by comparing the number of objects shown, the length of a curve or the area of a shape to a given number. Your choices are "greater than" or "less than".

This lesson shows elementary students how they can know that rigid motions like reflections, rotations, and translations create a shape congruent to the original.

Students explore the nature of triangles and their area. An applet and instructor resources are included. [Requires Java.]

This activity allows the user to practice estimation skills by determining if a given amount is more or less than the number of objects shown, the length of a curve, or the area of a shape. An interactive activity and teacher resources...