yes
A triangle... ...has three sides ...has three angles ...internal angles always add up to 180 degrees ...is a two-dimensional shape ...tessellates
no
Because all sides are the same length, and it is a regular shape. It tessellates, because if you lay squares of the same size adjacent to each other, they will leave no gaps.
Select a shape that tessellates. Some shapes will tessellate by themselves, others will tessellate in pairs (octagons and squares), or larger groups. See the link for a flavour.
No, it will not tessellate.
yes
All sorts. For starters, no convex polygon with more than six sides tessellates, and various polyominoes of seven or more squares don't.
A triangle... ...has three sides ...has three angles ...internal angles always add up to 180 degrees ...is a two-dimensional shape ...tessellates
A rhombus tessellates.
no
Yes, squares can tessellate.
Not everything tessellates
Because all sides are the same length, and it is a regular shape. It tessellates, because if you lay squares of the same size adjacent to each other, they will leave no gaps.
Select a shape that tessellates. Some shapes will tessellate by themselves, others will tessellate in pairs (octagons and squares), or larger groups. See the link for a flavour.
Triangles, Squares and Hexagons always tessellate.
No, a hexagon is not a tessellation. Some hexagons can tessellate a plane, others will not.