I.
Properties of triangles
01 Properties of triangles ⑴ 8
02 Properties of Triangles ⑵ 26

II.
Properties of a square
03 Parallelogram 46
04 Various squares 64

III.
Similarity of shapes
05 Similarity of Figures 88
06 Ratio of lengths of line segments between parallel lines 106
07 Center of gravity of a triangle 124
08 Utilizing Similarity 140

IV.
Pythagorean theorem
09 Pythagorean Theorem 152

V.
probability
Case 10 172
11 probability 192

The best basic math textbook in Korea, covering all types of school exam questions.

① Maximize learning effectiveness with a three-level learning system (A, B, C).
② Includes the latest school exam questions to help you prepare for frequently appearing and new types of questions.
③ Creative problems included to improve convergent thinking skills

1.
All the questions that appear on the exam are in this one book.

Because we've collected and analyzed past school exam questions from middle schools across the country and organized them by type, you can perfectly complete your middle school math studies with just one book, Sen Math.

2.
All problems are divided into 3 difficulty levels: A, B, and C.

A reasonable way to learn math is to tackle problems in order, from easy to difficult.
Strong Math divides all problems into three levels and organizes them by level. In the Type Breakdown section, these are further divided into easy, medium, and high difficulty levels to systematically develop math skills.


3.
Presenting three-dimensional and detailed types by concept

Problems arising from a single concept can appear in many different types.
All problems to be covered in Middle School Mathematics 2-2 are categorized into 156 types and organized into 1,142 problems to enable sufficient practice by type, thereby developing problem-solving skills.