1. Earliest Mathematicians
Little is known of the earliest mathematics, but the famous Ishango Bone from Early Stone-Age Africa has tally marks suggesting arithmetic. The markings include six prime numbers (5, 7, 11, 13, 17, 19) in order, though this is probably coincidence.
The advanced artifacts of Egypt’s Old Kingdom and the Indus-Harrapa civilization imply strong mathematical skill, but the first written evidence of advanced arithmetic dates from Sumeria, where 4500-year old clay tablets show multiplication and division problems; the first abacus may be about this old. By 3600 years ago, Mesopotamian tablets show tables of squares, cubes, reciprocals, and even logarithms, using a primitive place-value system (in base 60, not 10). Babylonians were familiar with the Pythagorean theorem, quadratic equations, even cubic equations (though they didn’t have a general solution for these), and eventually even developed methods to estimate terms for compound interest.
Find the area of the shaded region between triangle ABC and triangle GHI, if the corresponding sides of the three triangles are parallel and 1 unit apart. Triangle DEF lies midway between the other two triangles. The lengths of the three sides of triangle DEF are 5, 6, and 7 units. (See Figure 1)
Coba diperhatikan kedua segitiga berikut, kenapa salah satu segitiga tersebut ada yang bolong padahal luas keduanya sama.
Klo kita simulasikan ke kertas berpetak, sebenarnya segitiga total pada gambar 1 dan gambar 2 tidak segaris. pada gambar 1 dan 2 ada 2 garis lurus yg
Everybody has a left brain and right brain, and we all use both sides. But most people use one side more than the other. This hemispheric dominance affects the way we process information and learn. Learning with both sides helps us make the most of our brains. Incorporating brain learning strategies into academic endeavors will address the left-brainers and right-brainers and allow both types to use more of their brains.