Pythagorean Theorem

In over our heads with radicals in 8th grade Algebra this week, so we took some time to review the Pythagorean Theorem.  Geometry is so beautifully concrete.  In addition to demonstrations you can do with drawings and such, here's an example of a very cool model that my 8th graders found wonderfully entertaining.   As... Continue Reading →

Identify Geometric Shapes

Here's a little activity to wrap up our geometry study for the week.  Have your students consider the following drawing and try to identify as many polygons as they can.  If they need a little guidance, here are some possibilities... regular hexagons rectangles parallelograms rhombi other irregular quadrilaterals a multitude of triangles -- equilateral, isosceles,... Continue Reading →

Copy Any Polygon

We can employ the two skills we've been working on this week -- constructing congruent segments and constructing congruent angles -- to create a copy of any polygon. Use a straight edge to draw any polygon.  Here's an irregular hexagon drawn for me by a helpful eighth-grader and his ruler: To copy your polygon, begin... Continue Reading →

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