Geometric Art Design Architect RulerYou can use a protractor to draw the desired figure and can also draw arc curves, horizontal parallel lines, and vertical parallel lines. Each centimeter has a circle hole for drawing circles and ellipses. And it has a clear scale, is easy to slide and observe, and is not easy to skew. Whether you are an artist, student, pattern maker, or designer, this measuring rolling ruler is a good helper for your work or study. It can help students develop their