I like this app because in a sense it is two apps in one. First, students can manipulate the various geometric shapes on the screen, simply be dragging and dropping (a skill needed for PARCC). While interacting with the shapes, they can see a relationship between them;
one hexagon is composed of a triangle, a parallelogram, and a trapezoid (CCSS.MATH.CONTENT.3.G.A.2) The second aspect of this app which I like is how it offers tangrams for the students to complete.
Challenge your students with Symmetry! "Can you make a reflection of this shape?"
I hope you enjoy this app and add it to your collection of Math Tool Apps.
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