Chapter+4


 * base of an isosceles triangle** (p. 228)
 * base angles of an isosceles triangle** (p. 228)
 * congruent polygons** (p. 198)
 * corollary** (p. 229)
 * CPCTC (corresponding parts of congruent triangles are congruent)** (p. 221)
 * hypotenuse** (p. 235)
 * legs of a right triangle** (p. 235)
 * legs of an isosceles triangle** (p. 228)
 * vertex angle of an isosceles triangle** (p. 228)