Selasa, 02 Juni 2009
di
07.54
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(My Small Dictionary for Mathematic )
1. Acute = Sudut Lancip
2. Addition = Penjumlahan
3. Angle = Sudut
4. Approximate = pendekatan
5. Average = Rata-rata
6. Base = Alas
7. Bisect line = garis bagi
8. Concept = Pengertian
9. Cylinder = tabung
10. Circle = lingkaran
11. Comparison = perbandingan
12. Curve = Garis lengkung / kurva
13. Cross = Bersilangan
14. Conclusion = Kesimpulan
15. Common = factor
16. Cube = kubus / pangkat tiga
17. Coordinate = koordinat
18. Congruent = Sama dan Sebangun
19. Decimal = decimal
20. Definition = Pengertian
21. Denominator = penyebut
22. Diameter = garis tengah
23. Difference = selisih
24. Division = pembagian
25. Empty = kosong / himpunan kosong
26. Equilateral = sama sisi
27. Estimation = Penaksiran
28. Even = genap
29. Exponential = pemangkatan
30. Fraction = pecahan
31. Imaginary = garis khayal
32. Integers = Bilangan Bulat
33. Intersection = Berpotongan
34. Mapping = Pemetaan
35. Measure = Ukuran
36. Median = Garis Berat
37. Numeral = bilangan
38. Numerator = Pembilang
39. Obtuse = sudut Tumpul
40. Odd = Ganjil
41. Ordering = Mengurutkan
42. Pattern = Pola
43. Parallel = Sejajar
44. Perpendicular = Tegak Lurus
45. Power = Pangkat
46. Plane = bangun datar
47. Prime = Bilangan prima
48. Prism = Prisma
49. Proof = Bukti
50. Proportions = Perbandingan
51. Protactor = Busur Derajat
52. Ranks = baris
53. Rectangle = Persegi Panjang
54. Reduce = pengurangan
55. Rhombus = Belah Ketupat
56. Relation = Hubungan
57. Right Angle = sudut Siku- siku
58. Right prism = prisma tegak
59. Root = Akar
60. Round = pembulatan
61. Subset = himpunan bagian
62. Sets = himpunan
63. Series = Deret
64. Secant = garis potong
65. Scalene = sebarang
66. Shadow = arsiran
67. Straight = Lurus
68. Solution = penyelesaian
69. Supplementary = pelurus
70. Superimpose = berimpit
71. Substraction = pengurangan
72. Tangent = Garis singgung
73. Top = puncak
74. Term = Suku
75. Union = Gabungan
76. Vertex = titik sudut
77. Zero = nol
Diposting oleh
ridwan putunaja
Selasa, 14 April 2009
di
10.50
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1. How to get phi numeral
To get phi, we can use a circle. Suppose we choose a circle with unit diameters .The length of the circumference of a circle lies between the perimeter of any inscribed polygon and that of any circumscribed polygon. We easily obtain bounds for phi. From the perimeters of given regular inscribed and circumscribed polygons, we may obtain the perimeters of the regular inscribed and circumscribed polygons having twice of number of sides. Starting with six-sided polygons, we can compute the perimeters polygons of 12, 24, 48, and 96 sides and we can get ever closer bounds for phi. This formula shows that phi is between two hundred twenty three per twenty one and twenty two per seven or in two decimal places is 3.14.
2. How to get abc formula
The abc formula is got for search the solution of the quadratic equations. If we have the quadratic equation ax square plus bx plus c equal 0, the abc formula get by:
a). make 1 the coefficient of x by dividing the equation with a,
b). passing constant in left side by quite the sides with c per a.
c). using the completing square to make the left side be a complete square. We can add square of half of x coefficient.
3. how to compute the area bounds of y equals x square and y equals x plus 2.
We must find bounds of curves with get the point of the curves. After that, we can use integral operation i.e. the top curve minus the under curve with bounds of x.
So, we find that the area is four half.
4. Cone’s volume
If we have a cone with a half of base diameter is r and the high is t, we can compute the volume is the area of base crossed by the high. Because the base of cone is a circle, so the volume is Phi cross a half of diameter cross t.
5. Proof that the summary of the angles of triangle is 180 degrees.
First, we make any kind of triangle, then make the length line of point anywhere. For example, C is same line with AC then passed AC, make the parallel line with AB.
Angle ACB + angle ABC +Angle CAB equals 180 degrees.
So, it proofed that the summary of the angles of triangle is 180 degrees.
6. Explain how to fixed probability the number more than six from 2 cubes throws once.
By using the chance, the sum which more than six from two cubes throws once is twenty one. So the probability number more than six is twenty one per thirty six.
7. Explain the way to get the equation throws (10,0) and x square plus y square equals nine.
Use tangent equation which throws (a,b) i.e. x index 1 cross x plus y index 1 cross y equals quadrate of half diameter.
So the equation can find by entering the founding elements.
8. Explain how to proof the Pythagoras
For example, a, b, c explain the right side and the sideway of right triangle. At two square which each with a plus b as a side. The first square divided be six part, that is two square and four of right triangles which congruent with the definite triangle. The second triangle divided be five part, that square at sideways and four right triangles congruent with definite triangle. So we found that the third number is triple Pythagoras. To find one of the numbers is square of sideways is equal to square of the right side plus the others.
9. Search the sum of first 200 odds.
Using the arithmetic series. First part is 1 and the difference is 2 and there is a hundred numbers. The sum of first two hundreds of odd is equals half of hundred cross twice first part plus hundredth minus 1 cross 2. The result is one hundred thousand.
10. Explain how to draw the cube if the side is found.
For example, the cube ABCD EFGH, the base is ABCD and each the right sides is AC, BF, CG, and HG.
The steps are:
Draw line of AB to horizontal purpose
In A, draw the deviation angle
Projection sideways ABCD is parallelogram, so the base can be finished
The middle are vertical lines, so EFGH can be drawed
We can draw the cube ABCD EFGH
Diposting oleh
ridwan putunaja
I don’t have a title to my written now because I don’t have a specific topic. I just only write about whatever I feel and whatever I get in English class with Mr. Marsigit.
First, I want to deliver my points of view about the English class in fourth week. In that meeting, as usual Mr. Marsigit looks tidy. As a very busy person, I think its okay if he mengutamakan his performance. “I must meet many people everyday, so I must look good”. He said with smile.
Mr. Marsigit always looks funny in every meeting. In every meeting, he also never felt bored to give us high motivation and spirit to get our aims. He never stops tell us about his experiences to be motivation for us.
Tell about the class, the material of study in this meeting is about linear equations and quadratic equations. Mr. Marsigit gave us about the definition of linear and quadratic equations and how to get the solution of it and also how to make it in the graphic. Solve the solution of equations means to substitute the variable by a constant to make the equations be a true statement. We can apply “substitute method“ and “eliminate method“ to solve the solution of the equations. The difference of linear and quadratic equation is linear equation is the equation which the highest power of the variable is “one” but quadratic equation is the equation which the highest power of the variable is “two”. So if the solutions are made in graphic we will get the straight line for linear equation and curve for the other.
The materials was same which we got in junior high school and senior high school and I think its very simple for us, but by using the different learning method it be interest more. We got English in mathematic.
In the last time of that meeting, Mr. Marsigit shown us his book. The title is mathematic for junior high school. The interested of his book is the settings of pages. In every page consist of two languages which Indonesian in the left side and English in the others. The essentials of his book is simple mathematic. Not too hard to study. The formulas, theorems, graphics and the examples for problem studies are very simple. I think his book is very good used to students of junior high school. They can get a lot of knowledge from his book. Not only for mathematic but also the English. They can exercise to use English. But, because of the cost, I think the book only used in the city, the students in the villages can’t buy this book.
Diposting oleh
ridwan putunaja
Sabtu, 21 Maret 2009
di
07.00
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The one way to learn mathematics is "abstraction". method is used by taking the important materials of mathematics. for example, we didn't need to describe the real form of cube to get it. we just only have to describe the elements of cube i.e the six sides of cube with the same measure. so, we just only need to describe the pattern without see the thing orderly.
Mathematics can be applied in every sector of our life. everything in around of us can be connected with mathematics. A long time ago, when the ancient people saw the river, they thought about the comparation ways for the canal to flow the rice fields. Then, they used the right formulas to compare the water for the rice. They made the irrigation system. It was very high concept for the ancient people.
The another, they also could build the great buildings by using the sophisticated of the computations. They didn't know if they used mathematics formulas, but they used it well. It is called the nature of mathematics.
Whe nature of mathematics is hoe to see the daily phenomena in our life by using mathematics. We can see everything by mathematics perspectives. We can relate anything with mathematics, the football game can be related with mathematics, we can relate the voice interval of the animal with mathematics,etc.
So the meaning of the nature of the mathematics is everything can be related with mathematics.
Diposting oleh
ridwan putunaja
Senin, 16 Maret 2009
di
21.41
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There is no meeting of my English class until three times because of the schedule of our lecturer didn’t match. So the first meeting we held on fourth week, on Tuesday, 10 march 2009. This meeting started at seven o clock in the Ex. Jica room.
The name of our English lecturer is Drs. Marsigit. For the early, I felt strange because our seat is made a half of circle and the lecturer’s seat in the centre. “It is for the good communication between students and the lecturer”. He said.
I think, with that position, the students can focus and concentrate more, there is no noisy in the class.
Mr. Marsigit told us much about his studies experiences. Actually, he was study in London. He always go to foreign country just for a presentation. The experience was made us motivated.
The other thing it becomes the point of our first meeting is talking about the syllabus and also about our task made a blog.
In the evening, we held the second meeting. The materials was same as the morning materials. Mr. Marsigit explained about our English learning. He explained about everything we can get in this subject. “There is five points that will be reached in English subject”. He said. “Communication, Understand, Application, Skills and Experience”, He added.
The interesting moment from the second meeting is when there was a sleeping student, he gave examination to us orderly, it was very shocked. The exam was to translate the mathematic Indonesian words into English. There were fifty questions for us. From all of the students, there is no one who could answer correctly even though an half of it. It means that we must study harder.
The conclusion of the second meeting is everyone is not allowed sleeping in his class.
Diposting oleh
ridwan putunaja
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