Attach (recommended) or Link to PDF file here:
http://education.ohio.gov/getattachment/Topics/Special-Education/Preschool-Special-Education/ETR-Preschool-Planning-Form.pdf.aspx

- Web browser and its version: Firefox 89.0.1
- Operating system and its version: Windows 10 10.0.19043.1052
- PDF.js version: commit 5d251a3a3e7bfaa8fbfa07f0b7f9901eb3f999d9
- Is a browser extension: No

Steps to reproduce the problem:
1. Enable XFA support
2. Open form

What is the expected behavior? (add screenshot)
Shapes stay inside table cells
![image](https://user-images.githubusercontent.com/7104454/122572782-1252a580-d01c-11eb-9d0f-5fed46d6f2fe.png)

What went wrong? (add screenshot)
Shapes fall outside cells (among other issues)
![image](https://user-images.githubusercontent.com/7104454/122572885-2d251a00-d01c-11eb-8863-fa3b9969f0ea.png)

const sweepAngle = (this.sweepAngle * Math.PI) / 180;
      const largeArc = this.sweepAngle - this.startAngle > 180 ? 1 : 0;
      const [x1, y1, x2, y2] = [
        50 * (1 + Math.cos(startAngle)),
        50 * (1 - Math.sin(startAngle)),
        50 * (1 + Math.cos(sweepAngle)),
        50 * (1 - Math.sin(sweepAngle)),
      ];
      arc = {
        name: "path",
        attributes: {
          xmlns: SVG_NS,
          d: `M ${x1} ${y1} A 50 50 0 ${largeArc} 0 ${x2} ${y2}`,
          vectorEffect: "non-scaling-stroke",
          style,
        },
      };
      Object.assign(attributes, {
        viewBox: "0 0 100 100",
        preserveAspectRatio: "none",
      });
    }
    return HTMLResult.success({
      name: "svg",
      children: [arc],
      attributes,
    });
  }
}
class Area extends XFAObject {