20 printable lessons to help your students improve their Spatial Awareness, understand intersecting lines and overlapping triangles, move beyond the obvious and experience true challenges (not just more of the same). The designs range from 11 to 60 triangles. These activities work well for the whole-class, but they are also perfect for independent or partner-work at math centers. Answer key! Lesson plans. Posters with samples and explanations.
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If you would like more of problem-solving, here are the others in this series:
How Many Triangles
How Many Circles
How Many Rectangles
How Many Cubes