## Simple is the best

### How to i can do Math?

R u feel math is very complicated?
Ok, i think you have to reading this!

/Articles from: wikihow.com\

STEPS
Create learning time. Make sure you have at least an hour a day to dedicate to learning mathematics.

Become acquainted with the vocabulary. Keep a mathematical dictionary by your side as you study. Many areas of mathematics require knowing a certain amount of mathematical vocabulary and it is less frustrating to be able to quickly look up the meanings.

Get at least two reference books on set theory. This way, you will have two different explanations and one of the explanations may make better sense to you than the other; or a combination of both will help you to “get it”.

Tackle subjects along with their prerequisites. Many concepts are related and knowing one helps you understand the other. If you didn’t grasp one concept as well as you should have earlier, set aside a little time to revisit it and learn some more and then combine it with the new concept. Often, the new concept will help the older one to gel in your mind.

Progress through the levels of mathematics. Work your way up to advanced mathematics through this progression: Basic algebra, basic geometry, basic calculus, intermediate algebra, regular calculus, number theory, linear algebra, advanced algebra, combinatorics, analysis, topology. However, note that many school districts do the progression of math in a different pattern. More commonly, pre algebra -> algebra I -> Geometry -> Algebra II (with Trig) -> Pre- Calculus -> Calculus (AP optional) -> statistics (assuming you are already two years advanced).

Practice with many problems. Do as many mathematics problems as you can lay your hands on – even those beyond the class. This will assist you in getting a good feel for the topics and will likely help much of mathematics become “second nature” to you.
Always ask for help if you don’t know how to do something. Also never stop trying to learn something because you say it is to hard keep working at it.

Get practice!

(Tips)
Frustration is part of the process so don’t give up just because you have a hard time understanding some concept.

Tackle all the basic stuff all at once and spend an hour every day learning one of the basics like algebra and geometry.

A good tutor once a week can really help to straighten out math problems; make sure your tutor is very understanding and can express the concepts well. Try university level students as a good source of tutors.

Regular practice will ease your challenges.
It cannot be stressed enough: Frustration is part of the process so don’t give up.
study as hard as you can and practise each and everyday

Mathematics is not a passive activity. You cannot learn mathematics by reading a textbook like a novel. You must be active and play with the concepts you learn. Can you apply them to areas not discussed in the book? Can you try to reformulate the concepts in a more personal way? Could you describe them to another person? If you don’t like your textbook, try to say exactly why, and then try to rewrite the relevant section in a better way. The key is to pursue the mathematics actively: don’t think you can accumulate a mathematical education by simply reading a textbook.

### Soal Matematika- bangun ruang. 3 SMP

Akhir” ini dapet mulu soal yang susah-susah semua…
(Jangan coba” nanya soalnya dari mana!!!)

1. Diameter alas tabung adalah 20 cm dengan tinggi 32 cm
a. Carilah volumenya!
b. Luas permukaan tabung tanpa tutup

2. Tabung nomor (soal)1 akan dimasukan sebuah kerucut. Kira” berapa volume kerucut terbesar yang bisa dimasukan ke dalam tabung tersebut?

3. Rusuk sebuah kubus adalah 27 cm. Carilah luas permukaannya!

4. Sebuah Drum air berbentuk tabung dengan keliling alasnya adalah 88 cm(^2) dan tinggi 35 cm. Dimasukan air sampai penuh. Tetapi karena Drum tersenut bocor, airnya menjadi tidak penuh lagi. Apabila dalam 40 detik volume air didalam drum berkurang 2.5 cm kubik
Dalam waktu 15 menit berapa ketinggian air di dalam drum?

And the last one…
5. Sebuah segitiga abc kongruen dengan segitiga fgh. B adalah siku” samaseperti f
apabila ab adalah 12cm dan fg adalah 17 cm. Berapakah luas segitiga abc dan fgh?

Kalo bisa soal” yang diatas ini mungkin pada saat ulangan semesteran akan bisa (mungkin ya…)
* keep enjoy! hahaha…

>_< Kalo susah coba aja liat in nih!
Rumus Kubus
– Volume : Sisi pertama dikali sisi kedua dikali sisi ketiga (S pangkat 3)

Rumus Balok
– Volume : Panjang dikali lebar dikali tinggi (p x l x t)

Rumus Bola
– Volume : phi dikali jari-jari dikali tinggi pangkat tiga kali 4/3 (4/3 x phi x r x t x t x t)
– Luas : phi dikali jari-jari kuadrat dikali empat (4 x phi x r x r)

Rumus Limas Segi Empat
– Volume : Panjang dikali lebar dikali tinggi dibagi tiga (p x l x t x 1/3)
– Luas : ((p + l) t) + (p x l)

Rumus Tabung
– Volume : phi dikali jari-jari dikali jari-jari dikali tinggi (phi x r2 x t)
– Luas : (phi x r x 2) x (t x r)

Rumus Kerucut
– Volume : phi dikali jari-jari dikali jari-jari dikali tinggi dibagi tiga (phi x r2 x t x 1/3)
– Luas : (phi x r) x (S x r)
– S : Sisi miring kerucut dari alas ke puncak (bukan tingi)

Rumus Prisma Segitiga Siku-siku
– Volume : alas segitiga kali tinggi segitiga kali tinggi prisma bagi dua (as x ts x tp x