Rhombus
a larger equilateral triangle
No but they will make a hexagon
Triangles are equilateral triangles only when all of their 3 sides are equal in lengths.
Yes. But not all isosceles triangles are equilateral.
To create three different drawings showing a number of circles and triangles in which the ratio is 2:3 you can: Start with an equilateral triangle, draw a circle inside it, draw an equilateral triangle inside the circle, draw a circle in the triangle and then draw an equilateral tiangle in the smallest circle. Or, you could draw 3 triangles and 2 circles in a line. Or, you could draw 3 triangles on a line with 2 circles between them.
All isosceles triangles are not equilateral triangles
All isosceles triangles are not equilateral triangles
Rhombus
Yes all equilateral triangles are acute triangles, but not all acute triangle are equilateral triangles.
a larger equilateral triangle
No but they will make a hexagon
Triangles are equilateral triangles only when all of their 3 sides are equal in lengths.
Four equilateral triangles make up another equilateral triangle.
Yes. But not all isosceles triangles are equilateral.
Sort of depends on how the two triangles are beforehand. One nice way to make four equilateral triangles from six matchsticks is to make a tetrahedron (a triangular pyramid).
Many different types, but mostly equilateral triangles.