# IED 1.2

## 39 terms

### Construction Line

Lines that serve as guides while sketching or drawing.

### Depth

The distance from front to back.

### Documentation

The documents that are required for something, or that give proof of something. 2. Drawings or printed information that contains instructions for assembling, installing, operating, and servicing.

### Edge

The outside limit of an object, a surface, or an area. 2. The line along which two surfaces of a solid meet.

### Ellipse

A regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points is constant. 2. The resulting shape when a cone is cut by an oblique plane which does not intersect the base.

### Freehand

Done manually without the aid of instruments such as rulers.

### Grid

A network of lines that cross each other to form a series of squares or rectangles.

### Height

The measurement of something from base to top.

### Hidden Line

A line that represents an edge that is not directly visible, because it is behind or beneath another surface.

### Isometric Sketch

A form of pictorial sketch in which all three drawing axes form equal angles (120 degrees) with the plane of projection.

### Line

A long thin mark on a surface; straight or curved that lacks thickness.

### Line Conventions

Standardization of lines used on technical drawings by line weight and style.

### Line Weight

Also called line width: The thickness of a line.

### Manufacture

To make something especially on a large scale using machinery.

### Measurement

The process of using dimensions, quantity, or capacity by comparison with a standard in order to mark off, layout, or establish dimensions.

### Multiview Drawings

Views of an object projected onto two or more orthographic planes.

### Object Line

A heavy solid used on a drawing to represent the outline of an object.

### Oblique Sketch

A type of sketch involving a combination of a flat orthographic front with depth lines receding at a selected angle, usually 45 degrees.

### Orthographic Projection

A method of representing three dimensional objects on a plane having only length and breadth.

### Perspective Sketch

A form of pictorial sketch in which vanishing points are used to provide the depth and distortion that is seen with the human eye. Can have one, two, or three vanishing points.

### Pictorial Sketch

A sketch that shows an object's height, width, and depth, in a single view.

### Plane

A flat surface on which a straight line joining any two points would lie, in its entirety.

### Point

A very small dot or mark on a surface that has position, but not spatial extent, magnitude, dimension, or direction.

### Profile

An outline of something as seen from one side.

### Projection Line

A horizontal or vertical line that can be used to locate points, or places in an adjacent view.

### Projection Plane

An imaginary surface on which the view of the object is projected and drawn. This surface is imagined to exist between the object and the observer.

### Proportion

The relationship of one thing to another in size, amount, etc.

### Scale

A ratio of size in a map, model, drawing or plan. 2. A tool to measure distances. 3. The ratio of the full object's size to its reduced view.

The representation of light and shade on a drawing or map.

### Shape

The external appearance of someone or something as produced by its outline. Considered a two dimensional contour.

### Size

How large or small something is.

### Sketch

A rough drawing representing the main features of an object or scene and often made a preliminary study.

### Solid

A three dimensional body or geometric figure.

### Technical Working Drawing

A drawing that is used to show the material, size, and shape of a product for manufacturing purposes.

### Tone

The general effect of color or of light and shade in a picture.

### Vanishing Point

A vanishing point is a point in space, usually located on the horizon, where parallel edges of an object appear to converge.

### Views

Short for multiview projection, which is a system used to view an object. E.g. Top, Front, Side(s)

### Visualize

To form a mental image of; Imagine.

### Width

The measurement or extent of something from side to side.