The Ruler helps you to keep your lines straight. The Ruler will guide your lines if you are using the ballpoint pen or highlighter tool. A ruler and protractor help you draw straight lines and circles and allow you to measure.
The Ruler helps you to keep your lines straight. The Ruler will guide your lines if you are using the ballpoint pen or highlighter tool. A ruler and protractor help you draw straight lines and circles and allow you to measure.