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
Do better in math today
5.
Triangles and special triangles
5.1
Pythagorean theorem
5.2
Solving expressions using 45-45-90 special right triangles
5.3
Solving expressions using 30-60-90 special right triangles
5.4
Classifying triangles
5.5
Congruence and congruent triangles
5.6
Triangles congruent by SSS proofs
5.7
Triangles congruent by SAS and HL proofs
5.8
Triangles congruent by ASA and AAS proofs
5.9
Isosceles and equilateral triangles