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- Third Year Maths
- Congruent Triangles
Congruence and congruent triangles
- Intro Lesson: a7:17
- Lesson: 1a1:41
- Lesson: 1b0:57
- Lesson: 1c2:12
- Lesson: 2a2:17
- Lesson: 2b1:18
- Lesson: 2c2:23
- Lesson: 2d1:44
- Lesson: 2e1:56
- Lesson: 34:12
- Lesson: 4a5:39
- Lesson: 4b5:40
- Lesson: 5a5:25
- Lesson: 5b7:17
Congruence and congruent triangles
Lessons
- Introductiona)
- Similar tirangles VS. Congruent triangles
- Ways to prove congruency:
- SSS
- SAS
- ASA
- AAS
- 1.Which pairs of triangles are congruent?a)
b)
c)
- 2.In the following diagram, △ GHK ≅ △ QRS.
i) Find.a)m∠ G = ?b)m∠ R = ?c)SR = ?d)HK = ?e)Find m∠ R. - 3.The gardener wants to divide a rectangular flower bed into 2 parts as shown in the following figure. Identify if the two parts are the same size and shape.
- 4.Write a two-column proof.a)
Given: AC≅BD, AD≅BC, ∠ CAD≅∠ CBD, ∠ ADC≅∠ BCD
Prove: △ ACD≅△ BDCb)Given: XC≅ZC
CY bisects XZ
Prove: △ XCY≅△ ZCY
- 5.Write a flow proofa)Given: AC≅BD, AD≅BC, ∠ CAD≅∠ CBD, ∠ ADC≅∠ BCD
Prove: △ ACD≅△ BDC
b)Given: XC≅ZC
CY bisects XZ
Prove: △ XCY≅△ ZCY