a decagon
A square pyramid.
A pyramid.
There are several: a tetrahedron with 4 equilateral triangles. An 8-sided solid (think of 2 Egyptian pyramids, turn one upside down and put the two square bases together). A 20-sided also has equilateral triangles.
You can make square pyramid.
A star
octagonal pyramid
A net has two equilateral triangles and 3 rectangles. What solid figure might it make?
Tetrahedron.
Pyramid
rhombus
A pyramid.
A square pyramid.
The figure is a pyramid and the base is a square.
The answer is a pyramid.
a pyramid
None it is impossible.
A pyramid.