Lesson 4.1 Classifying Triangles Today, you will learn to… * classify triangles by their sides and angles * find measures in triangles A B C  ABC Equilateral Triangle…

Chapter 4 Congruent Triangles Pg. 191 Conceptual Objective (CO): We will now begin to explore Triangles. We will classify them and determine (thru proofs) whether two triangles…

4.4 Proving Triangles are Congruent: ASA and AAS Geometry Mrs. Spitz Fall 2004 Objectives: Prove that triangles are congruent using the ASA Congruence Postulate and the AAS…

Warm Up Lesson Presentation Lesson Quiz Warm Up 1. If ∆ABC  ∆DEF, then A  ? and BC  ? . 2. What is the distance between (3, 4) and (–1, 5)? 3. If 1 …

4.4 Proving triangles using ASA and AAS Angle-Side-Angle (ASA)  postulate If 2 s and the included side of one Δ are  to the corresponding s and included side…

4.2 Congruence & Triangles Geometry Mrs. Spitz Fall 2005 Objectives: Identify congruent figures and corresponding parts Prove that two triangles are congruent 4.2 Work…

Congruent Triangles in the World By Sierra Smith Anna Johnson is going on a trip with her family traveling all around the world! What triangles will she see in different…

4-3 Proving triangles are congruent: SSS and SAS 4.3 & 4.4 Proving Triangles are Congruent Side-Side-Side (SSS) Congruence Postulate: If 3 sides of one triangle are congruent…

4.2 Congruence & Triangles 4.2 Congruence & Triangles Geometry Mrs. Spitz Fall 2005 Objectives: Identify congruent figures and corresponding parts Prove that two…

Applying Triangle Sum Properties Section 4.1 Triangles Triangles are polygons with three sides. There are several types of triangle: Scalene Isosceles Equilateral Equiangular…