Answer 1

The SVG tag has `width` and `height` attributes. These attributes can accept different units:
- pixels = `width="100px"`
- percentages = `width="100%"`
- viewport units = `width="100vw"`

(I'm sure they'll work for ellipses and rectangles)

---

When we use:

```
<svg width="200">
</svg>
```

I assume we use pixels.