Chapter 2 Section 1 Geometry

definition of a triangle : 1. given 3 noncollinear points A, B, and C, triangle ABC is the figure formed by the segment AB, BC, and CA2. the points A, B, and C are the vertices of the triangle3. the segments AB, BC, and CA are the sides of the triangle

definition of congruent triangles : triangle ABC is congruent to triangle DEF if and only if angle A is congruent to angle D, angle B is congruent to angle E, angle C is congruent to angle F, segment AB is congruent to segment DE, segment AC is congruent to segment DF, and segment BC is congruent to segment EF