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IED Unit 5 Key Terms
| Term | Definition |
|---|---|
| A triangle that contains only angles that are less than 90 degrees. | Acute Triangle |
| The amount of rotation needed to bring one line or plane into coincidence with another, generally measured in radians or degrees. | Angle |
| The number of square units required to cover a surface. | Area |
| 1. An imaginary line through a body, about which it rotates. 2. An imaginary line about which a regular figure is symmetrically arranged. 3. A fixed reference line for the measurement of coordinates. | Axis |
| A 3D point where the total weight of the body may be considered to be concentrated. | Center of Gravity |
| A 3D point defining the geometric center of a solid. | Centroid |
| A round plane figure whose boundary consists of points equidistant from the center | Circle |
| The measure of mass density is a measure of mass per volume. | Density |
| A straight line passing from side to side through the center of a circle or sphere. | Diameter |
| A shape generated by a point moving in a plane so that the sum of its distances from two other points (the foci) is constant and equal to the major axis | Ellipse |
| A curve formed at the interior intersection between two or more surfaces. | Fillet |
| To draw a figure within another so that their boundaries touch but do not intersect. | Inscribe |
| The amount of matter in an object or the quantity of the inertia of the object. | Mass |
| The curved upper surface of a liquid column that is concave when the containing walls are wetted by the liquid and convex when not. | Meniscus |
| A triangle with one angle that is greater than 90 degrees. | Obtuse Triangle |
| A four-sided polygon with both pairs of opposite sides parallel. | Parallelogram |
| The numerical value of the ratio of the circumference of a circle to its diameter of approximately 3.14159. | Pi (π) |
| Any plane figure bounded by straight lines. | Polygon |
| The lines of intersection created from three mutually perpendicular planes, with the three planes’ point of intersection at the centroid of the part. | Principal Axes |
| A solid geometric figure whose two ends are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms. | Prism |
| A four-sided polygon. | Quadrilateral |
| A straight line from the center to the circumference of a circle or sphere. | Radius |
| A parallelogram with 90 degree angles. A square is also a rectangle. | Rectangle |
| A polygon with equal angles and equal sides. | Regular Polygon |
| A triangle that has a 90 degree angle. | Right Triangle |
| Two or more exterior surfaces rounded at their intersections. | Round |
| A regular polygon with four equal sides and four 90 degree angles. | Square |
| The squared dimensions of the exterior surface | Surface Area |
| A straight or curved line that intersects a circle or arc at one point only. | Tangent |
| A table located in the bottom right-hand corner of an engineering drawing that identifies, in an organized way, all of the necessary information that is not given on the drawing itself. Also referred to as a title strip. | Title Block |
| A polygon with three sides. | Triangle |
| Each angular point of a polygon, polyhedron, or other figure. | Vertex |
| The amount of three-dimensional space occupied by an object or enclosed within a container. | Volume |
| A four-sided polygon. | Quadrilateral |
Created by:
toconnor
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