Imagine a large equilateral triangle

1
Imagine a large equilateral triangle
and a pot of blue paint
and a paint brush
Now paint your triangle
Michael Hall
2
Now imagine three smaller yellow equilateral
triangles?
Place one of the smaller triangles on the blue
triangle and move it until it fits into one
corner of the blue triangle?
Place the second of the smaller triangles on the
blue triangle and move it until it fits into one
of the remaining corners of the blue triangle?
And do the same with the third yellow equilateral
triangle