Part of Mathematics

Lingkaran ( CIRCLE)

• Jari-jari ( Radius)=The common distance of the points of a circle from its centre.
  

• busur lingkaran ( circumference of circle )=the perimeter of the circle (especially when referring to its length).


• JUring ( sector ) is a region bounded by two radii and an arc lying between the radii.


• Tembereng ( segment) is a region bounded by a chord and an arc lying between the chord's endpoints.

Jajar Genjang (parallelogram) is a quadrilateral with two sets of parallel sides. The opposite or facing sides of a parallelogram are of equal length, and the opposite angles of a parallelogram are of equal size.

Aksioma ( axiom)=In traditional logic, an axiom or postulate is a proposition that is not proved or demonstrated but considered to be either self-evident, or subject to necessary deciyion. Therefore, its truth is taken for granted, and serves as a starting point for deducing and inferring other (theory dependent) truths.

In mathematics the term axiom is used in two related but distinguishable senses: logical axioms and non-logical axioms. In both senses, an axiom is any mathematical statement that serves as a starting point from which other statements are logically derived. Unlike theorems, axioms (unless redundant) cannot be derived by principles of deduction, nor are they demonstrable by matematical proof, simply because they are starting points; there is nothing else from which they logically follow (otherwise they would be classified as theorems).

Belah ketupat ( rhombus )=In geometry, a rhombus (from Ancient greek ῥόμβος - rhombos, “rhombus, spinning top”), (plural rhombi or rhombuses) or rhomb (plural rhombs) is an equilateral parallelogram. In other words, it is a four-sided polygon in which every side has the same length.

The rhombus is often called a diamond, after the diamons suit in playing cards, or a lozenge, because those shapes are similar rhombi, although rhombi are not necessarily diamonds or lozenges.

A rhombus is a variety of quadrilateral. A rhombus with right angles is a square (because modern mathematicians usually prefer inclusive definitions, though Euclid specifically excluded the square from his definition).

The dual polygon of a rhombus is a rectangle.

apotema ( apothem ) is height a triangle formed by two radius nearing and one side in polygon.

Sejajar (parallel) = Two lines in the plane are said to be parallel if they do not meet.

tegak lurus ( perpendiculare) = Two straight lines are said to be perpendicular if they meet at right angles.

Radian = A unit of angular measurement such that there are 2 pi radians in a complete circle. One radian = 180/pi degrees. One radian is approximately 57.3o.

Segibanyak ( Polygon )= the union of several line segments that are joined together so as to completely enclose an area.

sudut tumpul (obtuse angle) is a corner which was built by rotation of a quarter circle and half-circle, so that the size of the obtuse angle of 90 - 180 degrees.

sudut lancip ( acute angle )acute angle is a corner wich built by a rotation of less than a quarter of a circle but not the same as 0, the amount of 0-90 degrees.

Taken from various resources such :

mathematicss dictionary Fourth edition ( James )

http://http://www.wikimedia.com/

http://http://www.mathpropress.com/

http://users.erols.com/

Introduction to English I

Assalamualaikum, wr. wb.
My name is Noti Lansaroni. I was an university student class of mathematic reguler 2008 at State University of Yogyakarta. Now, I has been following university lecture of semester two. One of the lecture that I take is English I. The lecture of English I compared every tuesday at eleven O'clock. The lecturer of English I for my class is Dr. Marsigit.
Firstday lecture of English I, Mr Marsigit tell us to introduce our self at class. Start with introduction from Mr. Marsigit. He is talking about his experience after become a lecturer. He also tell the story about his experience trip to foreign. He command us to make a blog. Blog is a media for classical interaction with other people. We also given an intruction how to make a blog and how to be follower of Mr. Marsigit blog.
For lecture of English I, Mr. Marsigit can't teach 100% because the time is not enought. He also can give a test every time, about grammar, vocab, or etc. So we must learn more and more. He think that university student is a high learner, so we must have responsibility. He give solution three solution to development our skill that is high spirit, support, and knowledge communication.
He think that we must understant the definition of mathematic. If we have false to define the definition of mathematic, we can't dominate mathematic. we must have high motivation, a good understanding and spirit. Don't affraid to express our idea. try to get partner in speak english step by step but consistenly.
That is my lecture experience for English I. A lot of knowledge that we can get from the English I lecture.