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Posts tagged with Babylonians

Take one tablet a day to become a better mathematician

September7

This is an ancient clay tablet (aka school book)¬†discovered in Babylonia in the second millennium B.C. – some 1000 years before Pythagoras. You will notice that is shows, within the square, an isosceles triangle with a diagonal hypotenuse. The Babylonians¬†understood the relationship between the sides of a right-angled triangle, and, in solving for the hypotenuse, […]

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Recreational Mathematics puts the Babylonians ahead of Pythagoras

February6

In this CNN article:¬†“Over 1,000 years before Pythagoras was calculating the length of a hypotenuse, sophisticated scribes in Mesopotamia were working with the same theory to calculate the area of their farmland. Working on clay tablets, students would “write” out their math problems in cuneiform script, a method that involved making wedge-shaped impressions in the […]

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NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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