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Interesting math knowledge:
1. If the length of the "one hand" is 8 cm, and the length of the desk is 7 cm, it can be seen that the length of the desk is 56 cm. If each step is 65 centimeters long, when you go to school, you can count how many steps you have taken to calculate how far you have traveled from home to school.
2. Height is also a ruler. If the height is 150 cm, then hold a large tree and put your hands together, and the length of the tree's circumference is about 150 cm. Because each person has their arms stretched out, the length and height between the tips of their fingers are about the same.
3. If you want to measure the height of the tree, the shadow can also help. Just measure the shadow of the tree and the length of your own shadow. Because the height of the tree is the length of the shadow of the tree, and the height of the figure is long.
4. If you want to know how far away the mountain in front of you is, you can ask the sound to help measure it. The sound can travel 331 meters per second, so shout at the mountain, look at it for a few more seconds and you can hear the echo, multiply 331 by the time you hear the echo, and divide it by 2 to calculate it.
5. "Celestial Recorders" Polyp scientists have found that polyps will record time on themselves: they "carve" a ring pattern on the body wall every day, and "carve" 365 a year, neither more nor less.
So to know their age, just count the rings on their walls. Scientists have also found that 100 million years ago, polyps "carved" on their bodies every year are not 365, but 400. The reason is that at that time the rotation of the earth was only one hour a day, and a year was not 365 days, but 400 days.
<> interesting math science tips are as follows:
Arabic numeral.
Arabic numerals were invented by the ancient Indians, and later spread to Arabia and from Arabia to Europe, where Europeans mistakenly thought they were invented by the Arabs and called them "Arabic numerals". Because it has been passed down for many years, people call it so easy that people still make mistakes and call these number symbols invented by ancient Indians Arabic numerals.
Ninety-nine songs. Ninety-Nine Song is the multiplication mantra we use now. As far back as the Spring and Autumn Period and the Warring States Period BC, Jiujiu Song has been widely used by people.
In many works of the time, there are records about the ninety-nine songs. The original ninety-nine song is from "ninety-nine-eighty-one" to "two-two-like four", with a total of 36 sentences. Because it started from "Ninety-Nine-Eighty-One", it was named Ninety-Nine Song.
It was only between the 5th and 10th centuries that the Ninety-Nine Song was expanded to "One and One as One". Around A.D.
Ten. In the third and fourteenth centuries, the order of the ninety-nine songs became the same as those used now, from "one to one" to "ninety-nine eighty-one". Now there are two kinds of multiplication formulas used in China, one is 45 sentences, which is usually called "small ninety-nine"; There is also an 81-sentence one, which is often called "big ninety-nine".
3. Möbius ring.
A Möbius ring is a topological structure that has only one face and one boundary. You can twist a strip of paper to 180 degrees, and then bond the two ends together to form a Möbius ring.
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Math tabloids are a common type of tabloids that mainly promote knowledge about mathematics, let's take a look at math tabloids. The following is my collection of math manuscript materials, let's take a look!
The great mathematical genius – Gauss
Gauss (1777-1855) was a German mathematician, physicist and astronomer, and a Fellow of the Royal Society.
Gauss was the son of an ordinary farmer, and at an early age, he showed an extraordinary talent in mathematics. At the age of 3, he was able to correct his father's errors in calculations; At the age of 10, he independently discovered the summation formula for arithmetic progressions; At the age of 11, he discovered the binomial theorem.
The young Gauss's intelligence and precociousness were favored and sponsored by the prestigious Duke of Breck, which enabled him to continue his studies. Soon after entering university, the 19-year-old Gauss invented the method of making regular 17-sided shapes using only compasses and straightedges, solving a geometric problem that had been unsolved for 2,000 years.
In 1801, he published Studies in Arithmetic, which expounded number theory and higher algebra. Certain issues. He has made significant contributions to hypergeometric series, complex variable functions, statistical mathematics, and elliptic function theory.
As a physicist, he worked with William. Weber collaborated on electromagnetism and invented the electrode. For experiments, Gauss also invented the two-wire magnetometer, which is a very practical result of his research on electromagnetism.
At the age of 30, Gauss became the director of the Observatory of a prestigious German institution of higher learning, where he worked until his death. He also loved literature and linguistics throughout his life, and knew more than a dozen foreign languages. During his lifetime, he published 323 works, put forward 404 scientific ideas, and completed 4 important inventions.
After Gauss's death, a statue of him was erected in the city where he was born. To commemorate his discovery of a method for making 17 sides, the base of the statue was built into a 17 sides. He is recognized as a mathematician on a par with Newton, Archimedes, and Euler.
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Help you think of a column.
Math Bubble House.
Area of the parallelogram = base height.
The area of the trapezoid = (upper bottom + lower bottom) height 2
Diameter = 2 r
The circumference of the circle = d = 2 r
Area of the circle = r 2
Surface area of the box =
Length and width + length and height width and height) 2
The volume of the box = length, width, height.
Surface area of the cube = edge length Ridge length 6
The volume of the cube = edge length edge length edge length.
The side area of the cylinder = the circumference of the bottom circle is high.
The surface area of the cylinder = the area of the upper and lower bottom surfaces + the side area.
The volume of the cylinder = the base area is high.
The volume of the cone = the base area is 3 high
Cylinder volume = base area high.
Planar Figure, Name, Symbol, Perimeter, C, and Area
Square a—side length c 4a s a2
Rectangles A and B sides are long C2(A+B) s ab
1 There is only one straight line after two points.
2 The line segment between two points is the shortest.
3 Complementary angles of the same or equal angles are equal.
4 Co-angles of the same or equal angles are equal.
5 At a point, there is only one and only one straight line perpendicular to the known straight line.
6 Of all the line segments connected by a point outside the line and points on the line, the perpendicular line is the shortest.
7 The axiom of parallelism A point outside the straight line, there is one and only one straight line that is parallel to the straight line.
8 If both lines are parallel to the third line, the two lines are parallel to each other.
9 The isotope angles are equal, and the two straight lines are parallel.
10 The inner wrong angles are equal, and the two straight lines are parallel.
11 The inner angles of the same side are complementary, and the two straight lines are parallel.
12 Two straight lines are parallel, and the isotope angles are equal.
13 The two straight lines are parallel, and the inner wrong angles are equal.
14 The two straight lines are parallel, and the inner angles of the sides complement each other.
15 Theorem The sum of the two sides of a triangle is greater than the third side.
16 Corollary The difference between the two sides of a triangle is less than the third side.
17 Sum Theorem of the Interior Angles of a Triangle The sum of the three interior angles of a triangle is equal to 180°
18 Corollary 1 The two acute angles of a right triangle are congruent with each other.
19 Corollary 2 One outer angle of a triangle is equal to the sum of two inner angles that are not adjacent to it.
20 Corollary 3 One outer angle of a triangle is greater than any one of its inner angles that are not adjacent to it.
21 The corresponding sides and corresponding angles of congruent triangles are equal.
22 The Corner Edge Axiom (SAS) There are two triangles with equal congruence between the two sides and their angles.
23 The Corner Axiom (ASA) has two angles and their edges corresponding to two triangles that are congruent.
24 The corollary (AAS) is that there are two angles and the opposite side of one of the corners corresponds to two equal triangle congruences.
25 The edge edge axiom (SSS) has three sides corresponding to two equal triangle congruences.
26 Axiom of hypotenuse, right-angled edge (hl) There is an hypotenuse and a right-angled side corresponding to the congruence of two right-angled triangles that are equal.
27 Theorem 1 The distance from a point on the bisector of an angle to both sides of this angle is equal.
28 Theorem 2 to a point where the distance to both sides of an angle is the same as on the bisector of this angle.
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If you want to do math hand-copied newspaper homework, you can write the following aspects.
1.The formula you learned (because I don't know what grade you are, I can't help you find it) 2Example problems, such as functions, geometry, etc.
The views of 3 celebrities on mathematics are what Hua Luogeng said.
4. Draw a border or something, and the color is best plain.
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1.The formula you learned (because I don't know what grade you are, I can't help you find it) 2Example problems, such as functions, geometry, etc.
The views of 3 celebrities on mathematics are what Hua Luogeng said.
4. Draw a border or something, and the color is best plain.
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