## Task 3 - 040613

A 6th grade class made various paper triangles. The students wanted to store these triangles in a cabinet in their school's mathematics room, which had nine compartments. The students had designated three compartments for the equilateral triangles, three for the isosceles triangles (i.e., those that are not equilateral), and three for the scalene triangles. Within these groups, the figures were to be further divided into acute, right, and obtuse triangles.

Check whether the number of compartments was correctly chosen!
Since there are no right-angled or obtuse triangles that are equilateral, 2 compartments remain unused. The number of compartments should therefore have been 7.