Chapter+5


 * altitude of a triangle** (p. 275)
 * centroid** (p. 274)
 * circumcenter of a triangle** (p. 273)
 * circumscribed about** (p. 273)
 * concurrent** (p. 273)
 * contrapositive** (p. 280)
 * coordinate proof** (p. 260)
 * distance from a point to a line** (p. 266)
 * equivalent statements** (p. 281)
 * incenter of a triangle** (p. 273)
 * indirect proof** (p. 281)
 * indirect reasoning** (p. 281)
 * inscribed in** (p. 273)
 * inverse** (p. 280)
 * median of a triangle** (p. 274)
 * midsegment** (p. 259)
 * negation** (p. 280)
 * orthocenter of a triangle** (p. 275)
 * point of concurrency** (p. 273)