Yes.
A nine sided polygon does not normally tessellate
Not every triangle has to have an obtuse angle.
no- it can be an isosceles triangle
Yes because the only way a triangle can be equiangular is if every angle is 60 degrees
Every equilateral triangle is equiangular, and every equiangular triangle is equilateral.
All triangles tessellate.
No.
No.
Yes.
yes it will
yes
A rhombus tessellates.
Yes, rectangles will tessellate.
every triangle has three midsegments because every triangle has three sides
A nine sided polygon does not normally tessellate
Not every triangle has to have an obtuse angle.
no- it can be an isosceles triangle