The area formula of trapezoid is expressed by letters: S=(a+c)×h÷2. The area formula of trapezoid is expressed by letters: S = L H. The area formula of trapezoid: the area of trapezoid with diagonal lines perpendicular to each other is: diagonal x diagonal line ÷2.
Use "S" to indicate the area of the trapezoid, "A" to indicate the upper bottom of the trapezoid, "C" to indicate the lower bottom of the trapezoid, "L" to indicate the side length of the trapezoid, and "H" to indicate the height of the trapezoid.
1, the area formula of trapezoid = (upper bottom+lower bottom) × height ÷2, and the area formula is expressed in letters: S=(a+c)×h÷2.
2. The area formula of trapezoid = midline× height, expressed in letters: s = l× h.
3. The area of trapezoid with mutually perpendicular diagonals is: S= diagonal x diagonal÷2.
The importance of learn mathematics:
1. Mathematics is closely related to our life. To say that the real effect of learning mathematics is not reflected in exam-oriented education, but in my own thinking about the future.
2. The importance of mathematics is self-evident. Mathematics is the foundation of all sciences and an important channel to cultivate logical thinking. It can be said that every major progress of our mankind is strongly supported by mathematics.
3. The application of mathematical knowledge in life is everywhere. From the calculation of daily living costs, to astronomy, geography, quality control, agricultural economy, aerospace, there are shadows of using mathematics.