Medial Triangle
The Triangle 
formed by joining the Midpoints of the sides of a Triangle 
. The medial triangle is sometimes also called the Auxiliary Triangle(Dixon 1991). The medial triangle has Trilinear Coordinates
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The medial triangle
of the medial triangle of a Triangle is similar to .
References
Coxeter, H. S. M. and Greitzer, S. L. Geometry Revisited. Washington, DC: Math. Assoc. Amer., pp. 18-20, 1967. Dixon, R. Mathographics. New York: Dover, p. 56, 1991.
- Wada Basin
- Walk
- Wallace-Bolyai-Gerwein Theorem
- Wallace-Simson Line
- Wallis Cosine Formula
- Wallis Formula
- Wallis's Conical Edge
- Wallis Sieve
- Wallis Sine Formula
- Wallis's Problem
- Wallpaper Groups
- Walsh Function
- Walsh Index
- Wang's Conjecture
- Ward's Primality Test
- Waring Formula
- Waring's Conjecture
- Waring's Prime Conjecture
- Waring's Problem
- Waring's Sum Conjecture
- Waring's Theorem
- Watchman Theorem
- Watson-Nicholson Formula
- Watson Quintuple Product Identity
- Watson's Formula