C.a.R.
Here are several geometry problems and investigations. The geometry content of these pages target the high school level. It is possible that students of other levels will be successful, too!
1-4: Intersections of rays and segments.
1-5: Determine angle relationships.
2-4: Parallel lines and angles, page 1.
2-4B: Parallel lines and angles, page 2.
2-5: Parallel lines and triangles.
3-1: Sum of the angles of a triangle.
3-2: Angles in three isosceles triangles.
3-3: Triangle side inequalities.
4-2: Explore Congruent triangles.