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- GCE O-Level Maths
- Congruent Triangles
Triangles congruent by ASA and AAS proofs
- Intro Lesson: a5:27
- Lesson: 1a3:03
- Lesson: 1b2:16
- Lesson: 1c2:33
- Lesson: 2a5:14
- Lesson: 2b1:51
Triangles congruent by ASA and AAS proofs
Lessons
- Introductiona)
- Similar tirangles VS. Congruent triangles
- Ways to prove congruency:
- SSS
- SAS
- ASA
- AAS
- 1.What is the third congruence that is needed to prove that △ABC≅△DEF using the given postulate or theorem?
a)AB≅DE and ∠C≅∠F
Prove by AAS.b)AC≅DF and ∠A≅∠D
Prove by ASA.c)∠A≅∠D and ∠B≅∠E
Prove by AAS. - 2.Decide if the following triangles are congruent. Show your reasoning.a)△ABC, △CBD
b)△XYZ, △XWZ