Availability, in the context of a computer system, refers to the ability of a user to access information or resources in a specified location and in the correct format.
Defined, the triangle proportionality theorem states that if you draw a line parallel to one of the sides of a triangle that also crosses the other two sides, then that line will divide the two sides in a proportional way.
Another interpretation of this theorem is that every triangle with angles Î±, Î² and Î³ is similar to a triangle with side lengths equal to sin Î±, sin Î² and sin Î³. This triangle can be constructed by first constructing a circle of diameter 1, and inscribing in it two of the angles of the triangle.