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Question 6 - Ellipses & Parabolas Main Parts of an  Ellipse Major Axis (the long one) Minor Axis (the short one) Focal Points Vertex Key Concepts The distance from a focal point to the end of the minor axis is equal to 1/2 the major axis The distance from a focal point to any point on the curve of an ellipse and back to the other focal point is equal in length to the major axis How to Draw an Ellipse - Circle Method 1 - Draw a circle with a diameter equal to the  major axis  and a circle with a diameter equal to the  minor axis  using the same centre 2 - Divide the circles into 12 slices using your 30 deg set square 3 - Draw a vertical line down from each point where the lines meet the outer circle and draw a horizontal line across where the lines meet the smaller circle. Mark out the points where the horizontal and vertical lines meet. 4 - Use these points to freehand sketch the ellipse

Introduction One of the best ways to communicate one's ideas is through some form of picture or drawing. This is especially true for the engineer. The purpose of this guide is to give you the basics of engineering sketching and drawing. We will treat "sketching" and "drawing" as one. "Sketching" generally means freehand drawing. "Drawing" usually means using drawing instruments, from compasses to computers to bring precision to the drawings. This is just an introduction. Don't worry about understanding every detail right now - just get a general feel for the language of graphics. We hope you like the object in Figure 1, because you'll be seeing a lot of it. Before we get started on any technical drawings, let's get a good look at this strange block from several angles. Figure 1 - A Machined Block. Isometric Drawing The representation of the object in figure 2 is called an isometric drawing. This is one of a fami