* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Section 4-2
Survey
Document related concepts
Multilateration wikipedia , lookup
Penrose tiling wikipedia , lookup
Technical drawing wikipedia , lookup
Golden ratio wikipedia , lookup
History of geometry wikipedia , lookup
Euler angles wikipedia , lookup
Apollonian network wikipedia , lookup
Rational trigonometry wikipedia , lookup
Trigonometric functions wikipedia , lookup
Reuleaux triangle wikipedia , lookup
History of trigonometry wikipedia , lookup
Incircle and excircles of a triangle wikipedia , lookup
Pythagorean theorem wikipedia , lookup
Transcript
Section 4-2 Some Ways to Prove Triangles Congruent Postulates: 1. SSS Postulate (Side-Side-Side) If three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent. Ex: D C F A B ABC By SSS Postulate, E DEF 2. SAS Postulate (Side-Angle-Side) If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the triangles are congruent. Ex: D By SAS Postulate, B A C ABD CDB 3. ASA Postulate (Angle-Side-Angle) If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the triangles are congruent. D B C E A By ASA Postulate, ACB DCE