Thread: Triangles - Probability

Consider all of the possibilities of generating a triangle with three diagonals and/or sides of a regular hexagon. In each case, find the probability that a point inside the hexagon is also inside the triangle. Explain each solution.

to see the picture on this one .. you must click on this link: InterMath

Can anyone help with this problem?

Hello, jthomp18!

The problem involves Counting and some simple geometry.
Exactly where is your difficulty?

Consider all of the possibilities of generating a triangle with three diagonals and/or sides of a regular hexagon.
In each case, find the probability that a point inside the hexagon is also inside the triangle. .Explain each solution.

To see the picture on this one .. you must click on this link: InterMath

Case 1: three diagonals.

There are 2 possible triangles.
The area of the triangle is the area of the hexagon.
The probability is


Case 2: two diagonals, one side.

There are 12 possible triangles.
The area of the triangle is the area of the hexagon.
The probability is


Case 3: one diagonal, two sides.

There are 6 possible triangles.
The area of the triangle is the area of the hexagon.
The probability is