Unit+3+-+Lesson+2+-+Perimeter+of+Scalane+Triangles

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This is a great gizmo for comparing two similar objects. You can change the shape of Figure 1 and rotate Figure 2. Use the slider to adjust the similarity ratio, making Figure 2 either larger or smaller. Checkboxes are also available to display the Area or Perimeter.======

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The Similar Figures - Activity B gizmo allows the user to choose from 6 different shapes, and explore their similarity to another figure of the same shape. Sliders are available to rotate and scale the object. Toggling options are available to choose whether to show the lengths of the sides or the measure of the angles of different parts of the object.======

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The ExploreLearning: Geoboard - Pythagorean Theorem Gizmo is a great interactive GeoBoard for drawing and demonstrating different types of polygons. With the click of a button, you can display the length of all of the sides, the area, and any right angles.======