What are the relationships between a acute triangle and a equilateral triangle?

Answer 1

Both have 3 sides

Both have 3 interior acute angles that add up to 180 degrees

Both have 3 exterior angles that add up to 360 degrees

Both will individually tessellate

Both have a perimeter which is the sum of their 3 sides

Both have an area which is 0.5*base*perpendicular height

Both have no diagonals

Both are subjected to the rules of trigonometry