1. Choose the Right triangle. As the
sand falls through the holes, these holes can be connected with three lines that
meet at one point. The three lines are called, perpendicular internal bisector.
2. Make sure the distance from the point where the
lines meet to each vertex is the same using compasses. Also, explain the result
with the properties of perpendicular internal bisector.
3. Based on the point where the lines met, draw a
circle that contains one vertex of the triangle and make sure the other two
vertexes are contained as well.
4. Based on the point from step 3, draw a circle
again that contains one vertex of the triangle and make sure the other two
vertices are on the circle as well.
5. Look at the pile of sand made in the box and
observe the outcenter of the triangle.
