Material Detail

Virtual Geoboard: 

Practice: Calculate area contained inside the rubber band (only in square mesh).

Verify Pick's Theorem: A = I + B/2 -1

A = Area

I = Inner dots.

B = Border dots.

Convex, concave polygons, positive or negative areas:

Triangles

Rectangles

Squares

Tilted rectangles

Tilted squares

Tilted triangles

Farey Sunburst

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