1<svg width="100" height="100">
2 <circle cx="50%" cy="50%" r="10" fill="red"/>
3</svg>
1<svg width="100" height="100">
2 <circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" />
3</svg>
1<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg">
2 <circle cx="50" cy="50" r="50"/>
3</svg>
1<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'>
2 <circle cx="50" cy="50" r="50"/>
3</svg>