Hello,

My son wants to test the strength of 3D Shapes to prove which one is the strongest. (He is in 5th grade)

While brainstorming we are confused about few things

1. How do we build the hypothesis - Should we say that if a shape has more triangles then it will be able to handle more weight. He has studied in school that triangle is the strongest shape. So, he is wondering if that strength of triangle will make the 3D shapes stronger as well. He plans on testing Cube, Prism, Triangular Prism, Square Pyramid, Triangular Pyramid. Or is there any other way to prove this.

2. In terms of testing the weight it can bear - should he

(a) create sand bags of 250 gm each and stack them on the shape

or

(b) create a testing station with four columns in square, put the shape in the center, put a cardboard plank on it and put weights on the plank. Would the weight exert pressure only on the shape or will it get distributed to the columns?

Thanks

Ami.