Introduction to trapezoid:
A trapezoid is a quadrilateral with only a group of parallel opposite sides, and the parallel sides are called the bottom of the trapezoid: the longer bottom is called the bottom, and the shorter bottom is called the top bottom; The other two sides are called waist; The vertical section sandwiched between the two base sides is called the height of the trapezoid. A trapezoid whose waist is perpendicular to the bottom is called a right-angled trapezoid. An isosceles trapezoid is called an isosceles trapezoid.
Introduction to math class:
It is a subject in primary and secondary schools. China was called arithmetic in ancient times, and later it was called arithmetic. Mathematics was unified from September 65438 to September 0936. The contents of mathematics teaching in primary and secondary schools mainly include arithmetic, algebra, geometry, trigonometry, plane analytic geometry, calculus, statistics and probability. In order to meet the requirements of economic and social development in different periods and the changes of educational purposes and educational objects, it was changed.
The establishment of mathematics in China School began in the sixth year of Tongzhi in Qing Dynasty (1867), when the Arithmetic Museum was added in Shi Jing Wentong Museum. The Charter of Music School promulgated in the 29th year of Guangxu (1904+0) stipulates that elementary schools and institutions of higher learning offer arithmetic, while middle schools and institutions of higher learning offer arithmetic, algebra, geometry, trigonometry, analytic geometry and calculus.
Introduction to mathematics:
Mathematics [English: Mathematics, from ancient Greece μ? θξμα(máthēma)； Often abbreviated as math or maths], it is a discipline that studies concepts such as quantity, structure, change, space and information.
Mathematics is a universal means for human beings to strictly describe and deduce the abstract structure and mode of things, and can be applied to any problem in the real world. All mathematical objects are artificially defined in essence. In this sense, mathematics belongs to formal science, not natural science. Different mathematicians and philosophers have a series of views on the exact scope and definition of mathematics.
Mathematics plays an irreplaceable role in the development of human history and social life, and it is also an indispensable basic tool for studying and studying modern science and technology.