Yes
Triangles, squares and hexagons. That is if they all have to be the same. If you use different regular polygons, you can tile a flat surface with triangles and 12-sides or with squares and 8-sides for example.
If a tile is a square or rectangle, cut the tile from corner to corner and you will create two triangles.
Yes, all plane triangle.
No.
Yes
Yes.
All triangles
Yes all triangles tile because their angle sum, 180 degrees, is a multiple of 360 degrees.
Yes.
all of the quadrilaterals, triangles, and many more. In fact, all the polygons.are plane figuresl
The only ones are equilateral triangles, squares and regular hexagons.
Triangles, squares and hexagons. That is if they all have to be the same. If you use different regular polygons, you can tile a flat surface with triangles and 12-sides or with squares and 8-sides for example.
If a tile is a square or rectangle, cut the tile from corner to corner and you will create two triangles.
Yes, all plane triangle.
The least number of obtuse triangles, if all possible triangles are drawn for n points in a plane, is zero. If all the n points lie in a straight line, no triangles are possible and so no obtuse triangles are able to be drawn; thus for any number n, there is a possibility that no obtuse triangles can be drawn, so the least possible number of obtuse triangles drawn is zero.
no