Triangle 55 Congruence SSS and SAS 4 4

Triangle 55: Congruence: SSS and SAS 4 -4 Lesson Side, Angle, Side Do Now: Take out HW Holt Geometry

PAGE 266 SSS and SAS 4 -4 Triangle Congruence: Holt Geometry

4 -4 Triangle Congruence: SSS and SAS Holt Geometry

4 -4 Triangle Congruence: SSS and SAS Holt Geometry

4 -4 Triangle Congruence: SSS and SAS (s) (s) Holt Geometry

4 -4 Triangle Congruence: SSS and SAS Since only one pair of corresponding sides are congruent, the triangles are not congruent. Holt Geometry

4 -4 Triangle Congruence: SSS and SAS Holt Geometry

nd “shortcut” to proving triangles is: The 2 4 -4 Triangle Congruence: SSS and SAS Theorem Holt Geometry

4 -4 Triangle Congruence: SSS and SAS Reminder: An included angle is an angle formed by two adjacent sides of a polygon. (INCLUDED = IN BETWEEN) B is the included angle between sides AB and BC. Holt Geometry

4 -4 Triangle Congruence: SSS and SAS Symbols: SAS or SAS Thm. Holt Geometry

4 -4 Triangle Congruence: SSS and SAS B TRY THIS! CB , GIVEN: bisects PROVE: ∆ADB ∆CDB. A Statement (S) 1. D C Reason 1. Given bisects (A) 2. (S) 3. 4. ∆ADB ∆CDB Holt Geometry 2. An angle bisector divides an angle into 2 congruent angles 3. Reflexive Postulate 4. SAS

4 -4 Triangle Congruence: SSS and SAS Given: Prove: Statement 1. Reason (S) 2. angles. 4. (A) 5. Holt Geometry (S) J L M 1. Given are right 3. K 2. Perpendicular lines intersect to form right angles. 3. All right angles are congruent 4. Reflexive Postulate 5.

4 -4 Triangle Congruence: SSS and SAS iz h. u Q C ! y a d n. 4 o 5 M. 15 HW # 55 Mo Quiz nd 5. 1 ay! C h. -5. 4 Big Ideas Read pp. 246 -248 and follow examples Do p. 249 – 250 1, 2, 4 -14 even, 15, 16, 25, 26, 29, 32 -35. Holt Geometry