Task English II

(My story about my experience to explain a topic in mathematics)

My Experience about Math and English

To development of mathematics and make us active in the English language communication lecturers to give exercise to explain a concept of mathematics to a friend. Noviana is my friend, he became my partner. We did experience in Novi’s house on Saturday, january 10, 2009.

Before I do the experience, I made a post about “cube”. My post is containing any posts about definitions, concepts, formulas, examples and exercises from cube. I am get reference from the internet and books. This is my following explanation of the topic.

The definition of cube is a three dimensional solid object bounded by six square faces, facets or sides, whit three meeting at each vertex. The cube can also be called a regular hexahedron. Normally, cube has same as edge length. The elements of cube there are face=6, vertex=8, edge=12 and have dihedral angle.

For a cube centered at the origin, with edges parallel to the axes and with an edge length of 2, the Cartesian Coordinates of the vertices while the interior consists of all point (x0, x1, x2) with -1 <>

For a cube of edge length a. Because the cube has 6 faces square so the formula of surface area is 6 multiply with area of square. In symbols A = 6 . a^2. As the volume of a cube is the third power of its sides a x a x a, third powers are called cubes, by analogy with squares and second powers. In symbols V = a^3.

The example:

1. A dies has 20mm in edge length. How is the surface area and volume of that cube?

Answers:

Edge length (a) = 10

A = 6 . a^2 V = a^3

= 6 . 20^2 = 20^3

= 6 . 400 = 8000

= 2400

So the surface area of dies is 2400mm^2 and volume is 8000mm^3

The Exercise:

1. A box with same as edge length has 125000cm^3 in volume. How is the edge length and surface area of the box?

When I was explaining to Noviana, she was attention my explanation. However I am feel difficult in explain my post, because I not yet fluent in English language communication. But I remain confident, so she can understand the meaning of my sentences. For me, she is more than smart in the use of the English language as a communication. She has very enthusiastic with my explanation. But she didn’t ask me a lot about my explanation, because the cube is a topic that is very easy to learn. She also can right answer from all question. And finally, I say many thanks to the English language lecturers 2 that he has encouraged me to be more active in the English communication.

Source:

http://en.wikipedia.org/wiki/Cube

Buku Pelajaran Matematika SMP, Erlangga 2000.