dars
lab
free school lessons
Lessons
My cabinet
Badges
About
Grade 9
1
2
3
4
5
6
7
8
9
10
soon
11
soon
🌐
EN
UZ
O‘zbekcha
EN
English
RU
Русский
Log in
Algebra
Geometry
Uzbek language
Literature
English
Russian language
Computing
History of Uzbekistan
World history
Physics
Chemistry
Biology (Cytology and genetics)
Geography (World economic and social geography)
Technology
Constitutional law
Economics
Advertisement
728×90 · 320×100
Review (Grades 5–8)
1
Review of Grades 5–8: triangles and quadrilaterals
Lessons 1
2
The Pythagorean theorem and its applications
Lessons 2
3
Calculating perimeter and area
Lessons 3
4
Plane geometry in solids; project work
Lessons 4–5
Chapter I
Geometric transformations and similarity
5
Similarity of polygons and triangles
Lessons 6–7
6
The AA and SAS similarity tests
Lessons 8–9
7
The SSS test and right triangles
Lessons 10–11
8
Applications of similarity and review
Lessons 12–14
9
Motion, translation and symmetry about a line
Lessons 15–16
10
Central symmetry and rotation
Lessons 17
11
Similarity of figures; properties of similar polygons
Lessons 18–19
12
Homothety and constructing similar polygons
Lessons 20–21
13
Practical applications of similarity
Lessons 22
14
Mixed problems and Chapter I review
Lessons 23–24
Chapter II
Relations between the sides and angles of a triangle
15
Sine, cosine, tangent and cotangent of an angle
Lessons 25
16
Problems with trigonometry and the area of a triangle
Lessons 26–27
17
The law of sines
Lessons 28
18
The law of cosines
Lessons 29
19
Applications of the theorems; dot product
Lessons 30–31
20
Solving triangles; mixed problems
Lessons 32–33
21
Practical applications and Chapter II review
Lessons 34–35
Chapter III
Circumference and area of a circle
22
Inscribed and circumscribed polygons
Lessons 36–37
23
Regular polygons
Lessons 38
24
Circles inscribed in and circumscribed about regular polygons
Lessons 39–40
25
Review and the circumference of a circle
Lessons 41–42
26
Arc length and radian measure
Lessons 43
27
Area of a disc and its parts
Lessons 44–45
28
Practice and the Chapter III test
Lessons 46–47
Chapter IV
Metric relations in a triangle and a circle
29
Projections of segments
Lessons 48
30
Properties of proportional segments
Lessons 49
31
Proportional segments in a right triangle
Lessons 50–51
32
Proportional segments in a circle
Lessons 52
33
Practice and the Chapter IV test
Lessons 53–54
34
Final review
Lessons 55
☰ Contents · Geometry
Grade 9
›
Geometry
›
Week 5
Similarity of polygons and triangles
Lessons 6–7 · 2 lessons · B. Xaydarov, E. Sariqov, A. Qo‘chqorov. Geometry, Grade 9 (textbook for general secondary schools), revised 4th edition. Huquq va Jamiyat Publishing, Tashkent, 2019
Lesson 6
Lesson 7
Quiz
8
Homework
5
Turn on JavaScript in your browser to take the quiz.
← Previous
Week 5 · Lesson 7: Similar triangles and their properties
Next →
Week 5 · Homework
Advertisement
300×250 · 728×90