Basic Triangle Inequality Prop of: Perp Segment & Angle Bisectors Angles and Sides Triangle Side Inequalities - Given 3 Sides Will They Form a Triangle? - Given 2 Sides, What's the Range of Sides for a 3rd Side to Form a Triangle? Midsegment Prop of Triangles Midsegment = 1/2 Parallel Side <-> 2 x Midsegment = Parallel Side Any One or Two Midsegments of a Triangle Create: - Congru Alt Int Angles or Corresp Angles - Suppl Same-Side Int Angles