A perspective drawing is a drawing that gives the illusion of depth and relative size as would be seen by the kind eye looking at the actual three-dimensional object. A one-point perspective drawing has one vanishing point on the horizon, plot a two-point perspective drawing has two vanishing points.
An isometric drawing shows three sides of a solid figure from a boxwood view. You can draw isometric views of a figure on isometric dot paper.
Orthographic views ar two-dimensional views of three-dimensional figures.
* For simple solids, there are six orthographic views: front, back, top, bottom, left, and right.
* every last(predicate) six orthographic views are needed to understand what the figure looks like.
You can find the surface area of a three-dimensional figure by adding the area of the faces.
You can find the leger of a rectangular solid by multiplying length by width by depth.
Points are locations in space. They have no length, width, or depth.
A var. is a collection of points (locations in space) arranged in a straight path.
A enclosure continues infinitely in both directions, with no endpoints. A line has no depth.
A plane is a set of points (locations in space) arranged in a flat layout that continues infinitely in all directions, with no edges. A plane has no depth.
any two coplanar lines that dont intersect are parallel.
* If two lines are parallel, then there is a plane that contains both the lines.
* If two lines intersect, then there is also a plane that contains them.
* skew lines are two lines that do not intersect simply are not parallel.
Any line that lies in a plane separates the plane into two half-planes. A half-plane consists of all of the points on one side of the line.
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