It’s probably not very sensitive to getting the angles exact, if you don’t need exact lengths either. But when I was taught to draw like that in school (some time between ages 11 and 14) we used paper with a dotted triangular grid, I think something like this, to get them without measuring.
If having a name helps: the first one looks like isometric projection.
It’s probably not very sensitive to getting the angles exact, if you don’t need exact lengths either. But when I was taught to draw like that in school (some time between ages 11 and 14) we used paper with a dotted triangular grid, I think something like this, to get them without measuring.