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In this calculus activity, learners use a classic problem of geometrical probability to find an important mathematical constant (pi).

In this activity, learners will measure the length of a shadow and use the distance from the equator to calculate the circumference of the earth.

In this activity, learners use geometry to predict the shape of carbon. Learners twist and attach chenille stem pieces that represent bonds between different carbon atoms.

In this math activity, learners observe and sketch cracking patterns in pavement.

In this activity, learners investigate how geometry plays a role in perspective.

In this demonstration, learners attempt to get a large coin through a small hole, the size of a smaller coin.

In this activity, learners explore how engineers incorporate biometric technologies into products as well as the challenges of engineers who must weigh privacy, security and other issues when designin