1. Using the vertices of a regular dodecagon as the vertices of triangles, the total number of acute and obtuse triangles that can be formed is $\qquad$.

 untranslated part: $\qquad$ (This part is typically left as a blank space for the answer to be filled in.)
-1.160 .
The circumference of a circle with 12 points can form $\mathrm{C}_{12}^{3}=220$ triangles; among the chords of a circle equally divided into 12 parts, there are 6 diameters, and each diameter corresponds to 10 right-angled triangles, thus yielding 60 right-angled triangles. Therefore, acute and obtuse triangles amount to $220-60=160$ (triangles).