Classifying triangles
- Intro Lesson: a5:24
- Lesson: 1a2:02
- Lesson: 1b1:34
- Lesson: 1c2:19
- Lesson: 1d1:37
- Lesson: 2a4:43
- Lesson: 2b8:10
- Lesson: 2c7:21
- Lesson: 3a2:42
- Lesson: 3b3:31
- Lesson: 3c3:26
- Lesson: 43:40
Classifying triangles
Lessons
- Introductiona)Naming types of triangles based on their properties
- By angles
- Acute
- Right
- Obtuse
- By sides
- Scalene
- Isosceles
- Equilateral
- 1.Classify the triangle by its sides and angles.a)
b)
c)
d)
- 2.Draw and classify the triangle by its vertices. Then, determine if it is a right triangle.a)A(3, 6), B(3, 1), C(9, 1)b)A(2, 4), B(5, 10), C(5, -2)c)A(8, 7), B(11, 3), C(4, 2)
- 3.Find x. Then, classify the triangle by its angles.a)
b)
c)
- 4.One angle of a triangular chocolate box is 20°. The measure of the second angle is 3 times smaller than the third one. Find the measures of the two unknown angles.
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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