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The degrees of the inner angles of a convex polygon are arranged from small to large, and the same degrees are increased in turn, where the minimum angle is 100 ° and the maximum angle is 140 ° to find the number of sides of the polygon
Let the number of edges be n and increase the same degree to x, then: 100 + (n-1) x = 140, the solution is: x = 40n − 1. Because (n-2) · 180 = n · 100 + n (n − 1) 2x = n · 100 + n · 20, the solution is: n = 6
The radius of a circle is 10m and its area is () square meters. The diameter of a semicircle is 10m and its area is () square meters
The circumference of a circle is 31.4dm, its diameter is () DM, its radius is () DM, and its area is () DM2
According to the derivation process of circle area, a circle with a radius of 1m is divided into an approximate rectangle. The area of the rectangle is () m2, and the perimeter is () M
In a square with a side length of 4cm, go to the largest circle. The radius of this circle is () cm, the area is () cm2, and the remaining area is () cm2
If the radius of a and B is 3cm and 6cm respectively, then the ratio of circumference of a and B is ()
For a clock, the length of minute hand is 10 DM. After half an hour, the area swept by minute hand is () DM2
The radius of a circle is 10m, its area is (314) square meters, the diameter of a semicircle is 10m, the area of the semicircle is (39.25) square meters. The circumference of a circle is 31.4dm, its diameter is (10) DM, its radius is (5) DM, and its area is (78.5) DM2
Ask a math question to fill in the blanks,
When there is a point in the polygon that is put together around a point____ Pentagons and____ This combination can form a beautiful mosaic pattern
When there is a point in the polygon that is put together around a point__ 2_ Regular pentagons and_ 1_ The degree of each inner angle of a pentagonal: [(5-2) x180 °] / 5 = 108 ° and the degree of each inner angle of a decagonal: [(10-2) x180 °] / 10 = 144 ° solution: suppose x ·
Ask a math fill in the blanks
The linear equation of the longest chord of a point m (3,0) passing through the square of circle x + the square of y-8x-2y + 10 = 0 is___________
The analytical formula of the circle is transformed into the standard formula
(x-4)^+(y-1)^=7
Obviously, the longest chord passing through a point in a circle should form a diameter of the circle. Therefore, the line where the longest chord is located is the line where the diameter is located, and the line passes through M (3,0) and the center of the circle (4,1)
Through the two-point formula of the straight line, the equation of the straight line can be obtained as follows:
y=x-3
Ask a question about filling in the blanks in the sixth grade of primary school
1. The deposit in the bank is called (), and the extra money paid by the bank is called (). The interest rate is the ratio of () to ()
Principal interest interest principal
(10) 32M is 8 meters more than () 50%, 40m is 10 meters less than () 50%
(11) The number of boys is 2 / 3 of that of girls, and girls account for ()% of the class
(12) If you subtract 50% of a rope, there is 5.2m left. If you subtract 2 / 1m, there is () m left
You have to get the formula!
(10) 32M is 8 meters more than (48m) 50%, 40m is 10 meters less than (84) 50% (32-8) △ 50% = 48m (32 + 10) △ 50% = 84m (11) the number of male students is two-thirds of that of female students, and the number of female students accounts for (60%) of the whole class
12 ÷（ ）= 6 /（ ）= （ ）/ 5 = 0.6 = ( )÷ 8 = （ ）％
12 ÷（20）= 6 /（10）= （3）/ 5 = 0.6 = (4.8)÷ 8 = （60）％
At the same time, Xiaoming measured that the shadow length of a tree was 4.5 times that of Xiaohua, whose height was 1.6m, so the height of the tree was______ ．
According to the meaning of the question, at the same time, the height of the tree, the height of Xiaohua = the shadow length of the tree, that is, the height of the tree 1.6 = 4.5, the solution, the height of the tree = 7.2m
Sixth grade mathematics fill in the blanks and application questions
Fill in the blanks: the amount of interest is determined by the amount of principal and deposit, In June of this year, Xiaoming's father actually received 2247 yuan, so how much is Xiaoming's father's current monthly salary? (2) Li Ming has 1000 yuan and plans to deposit it in the bank for two years, I'm going to choose one of the following two ways of saving. One is to deposit for two years, with an annual interest rate of 4.68%; the other is to deposit for one year, with an annual interest rate of 4.14%. When the first year is due, I will take out the principal and interest together, and then deposit them for one year. Do you help Li Ming calculate which way he chooses to get more interest? How much more yuan?
1. Interest = principal x interest rate X time, so the amount of interest is determined by the principal (how much), interest (how much) and deposit (time). 2. 2247-2000 = 247 yuan, pre tax interest 247 ^ (1-5%) = 260 yuan, Dad's current monthly salary is 2000 + 260 = 2260 yuan
Among the natural numbers from 1.1 to 20, the smallest prime number is (), the smallest composite number is (), the odd and composite number is ()
2. There is a three digit number. When 2.3.5 is used to remove it, there will be 1 left. The minimum of this three digit number is ()
3. A = 2 × 2 × 3, B = 2 × 3 × 3, the least common multiple of a and B is (), and the greatest common factor is ()
The greatest common factor of 4.28 and 42 is () and the least common multiple is ()
fast
Among the natural numbers from 1.1 to 20, the smallest prime number is (2), the smallest composite number is (4), and the odd and composite numbers are (9,15)
2. There is a three digit number. When 2.3.5 is used to remove it, there will be 1 left. The minimum three digit number is (121)
3. A = 2 × 2 × 3, B = 2 × 3 × 3, the least common multiple of a and B is (36), and the greatest common factor is (6)
The greatest common factor of 4.28 and 42 is (14), and the least common multiple is (84)
RELATED INFORMATIONS
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