Unit 2A
Constructions, Parallel lines, Triangle Sum, Isosceles Triangles, and Midsegments.
Constructions, Parallel lines, Triangle Sum, Isosceles Triangles, and Midsegments.

Parallel Lines and Transversals
www.mathsisfun.com/geometry/parallellines.html 
Isosceles Triangles Triangles Theorem:
Angles opposite congruent sides are congruent.
Converse: Sides opposite congruent angles are congruent.
www.khanacademy.org/math/geometryhome/congruence/workingwithtriangles/v/anotherisoscelesexampleproblem
Angles opposite congruent sides are congruent.
Converse: Sides opposite congruent angles are congruent.
www.khanacademy.org/math/geometryhome/congruence/workingwithtriangles/v/anotherisoscelesexampleproblem
Midsegment Theorem:
hotmath.com/hotmath_help/topics/trianglemidsegmenttheorem.html
hotmath.com/hotmath_help/topics/trianglemidsegmenttheorem.html
Triangle Congruence: Explore interactive website. Choose parts of a triangle and see if they result in congruence.
illuminations.nctm.org/Activity.aspx?id=3504
illuminations.nctm.org/Activity.aspx?id=3504