The typical representation of bluffs (other than rocky) on a topographical map.

In cartography, a contour line (often just called a "contour") joins points of equal elevation (height)…

The typical representation of depression contours, if otherwise ambiguous, on a topographical map.

"An inclined plane is a slope, or a flat surface, making an angle with a horizontal line...the force…

"An inclined plane is a slope, or flat surface, making an angle with a horizontal line...the force acts…

In cartography, a contour line (often just called a "contour") joins points of equal elevation (height)…

In cartography, a contour line (often just called a "contour") joins points of equal elevation (height)…

The Hill sign should be used in advance of a downgrade where the length, percent of grade, horizontal…

The Hill sign should be used in advance of a downgrade where the length, percent of grade, horizontal…

The Hill sign should be used in advance of a downgrade where the length, percent of grade, horizontal…

"One of the primary simple mechanical powers. The plane's surface is inclined to the horizon at any…

One way to spread water over a hillside field, "f m is the main ditch and the slope of the hill as shown…

Roof with a slope of 30 degrees. Angle theta is the inclination to the horizontal of the line AB, drawn…

This illustration shows a rock formation that has a tilted strata. d p is the direction of the dip.…

This illustration shows a rock formation that has a tilted strata. a b c d represents a square block…

Trajectory is the path a moving object follows through space. A trajectory can be described mathematically…

If land falls to a minimum line with a steady slope, the land form created is called a valley.

"This wedge is a movable inclined plane. Allows for raising great weights a short distance." —Quackenbos…