enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Intercept theorem - Wikipedia

   en.wikipedia.org/wiki/Intercept_theorem

   The intercept theorem, also known as Thales's theorem, basic proportionality theorem or side splitter theorem, is an important theorem in elementary geometry about the ratios of various line segments that are created if two rays with a common starting point are intercepted by a pair of parallels.

3. Parallel (geometry) - Wikipedia

   en.wikipedia.org/wiki/Parallel_(geometry)

   Since these are equivalent properties, any one of them could be taken as the definition of parallel lines in Euclidean space, but the first and third properties involve measurement, and so, are "more complicated" than the second. Thus, the second property is the one usually chosen as the defining property of parallel lines in Euclidean geometry ...

4. Midpoint theorem (triangle) - Wikipedia

   en.wikipedia.org/wiki/Midpoint_theorem_(triangle)

   The converse of the theorem is true as well. That is if a line is drawn through the midpoint of triangle side parallel to another triangle side then the line will bisect the third side of the triangle. The triangle formed by the three parallel lines through the three midpoints of sides of a triangle is called its medial triangle.

5. Parallel postulate - Wikipedia

   en.wikipedia.org/wiki/Parallel_postulate

   This postulate does not specifically talk about parallel lines; [1] it is only a postulate related to parallelism. Euclid gave the definition of parallel lines in Book I, Definition 23 [2] just before the five postulates. [3] Euclidean geometry is the study of geometry that satisfies all of Euclid's axioms, including the parallel postulate.

6. Playfair's axiom - Wikipedia

   en.wikipedia.org/wiki/Playfair's_axiom

   Antecedent of Playfair's axiom: a line and a point not on the line Consequent of Playfair's axiom: a second line, parallel to the first, passing through the point. In geometry, Playfair's axiom is an axiom that can be used instead of the fifth postulate of Euclid (the parallel postulate):

7. File:Two parallel lines being crossed by a third line.svg

   en.wikipedia.org/wiki/File:Two_parallel_lines...

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us