Arcs are drawn so accurately that a number of engineering problems can besolved graphically rather than mathematically. Suppose you need to measurethe circumference of an arc, just select that arc and the exact value isdisplayed. Drawing Ellipses and Elliptical Arcs Ellipses are much easier to draw with CADD than on a drawing board. On adrawing board, you need to find the right size template or draw a series ofarcs individually to draw an ellipse. With CADD, all you need to do isspecify the size of the ellipse.
Themajor axis determines the length of the ellipse and the minor axisdetermines the width.
To draw an ellipse you need to specify length and width, i.e., major axisand minor axis. You can enter the values numerically or by indicatingpoints in the drawing area. When you need to draw an ellipse rotated at anangle, you can indicate the axis rotated at an angle. To drawan elliptical arc, enter the starting point and the end point of the ellipse in addition to indicating the axes. When a circle is viewed at an angle, it takes on an elliptical shape.