Answer: one acre.
(2) Tian Guangyou 12 step, from 14 step. Find field geometry?
Answer: 168 step.
Tian Fang said: multiply the steps extensively to get the product steps.
Divided by 240 steps, that is, the number of acres. One hundred acres equals one hectare.
(3) Today, Tian Guang is a mile away. Find field geometry?
A: Three hectares and seventy-five acres.
(4) and Tian Guang Erli, from Li San. Find field geometry?
Answer: 22 hectares and 50 acres.
Day after day, Shu said: multiply widely and accumulate. Multiply it by 375, which is the number of acres. Chapter 9 Arithmetic-Pythagoras [1] Today, there is a saying: Three feet, four feet, how to find the geometry of strings? You said: five feet. (2) Today, there are five chords and three sentences. What is geometry? You said: four feet. (3) Today, there are four feet of strands and five feet of strings. What is geometry? You said: three feet. Sentence-stock technique says: Sentence-stock is multiplied and combined separately, while the square is divided, that is, string. Share is multiplied by itself, chord is multiplied by itself, and the rest is divided by the root, that is, the other sentence is multiplied by itself, chord is reduced, and the remainder is divided, that is, share. Today, the diameter of the log is two feet and five inches. If you want to make a square version, make it seven inches thick. Ask geometry? You said: two feet four inches. Technically, let the diameter multiply by two feet and five inches, subtract seven inches, and divide by the rest, that is, the width. Today, there are trees two feet long and three feet wide. Ge Sheng was born under it, wrapped around the wood for seven weeks, with the top flush with the wood. Ask ge Chang geometry? You said: twenty feet nine feet. Shu Yue: Take seven weeks times three feet as the shares, take the length of wood as the sentence, and seek the chord for it. Chorus, Ge Zhichang. (6) This pool is ten feet high, born in the pool, and the water is one foot high. Lead it ashore, and it will be suitable for landing. What is the water depth and the geometry of the water depth? You said: the water depth is one foot two feet; This scab is one foot three feet long. Technically speaking, the water depth is obtained by taking one foot out of the water, subtracting it and dividing the remainder by twice the water. Add the right amount of water and you will get a long-term cure. (7) Today, there is a tree, which is tied at the end and supports three feet of ground. Hold the rope, but it's okay. Go find Ben and bring it all. What is the cable length geometry? You say: one foot two feet, one sixth of a foot. Technically speaking, use the loss, so that if the entrusted number is one, the income is half of the entrusted number, that is, the length of today's cable [8] is one foot higher. Lean against the wall with the top flush with the wall. Lead a tree and walk a foot, and its wood will reach the ground. Seeking wood geometry? You said: five feet five inches. Tip: multiply the height of the wall by ten feet. If the number of rows is one, the income is half of the number of rows, that is, the number of wood lengths. (9) Today, there are logs buried in the wall, the size of which is unknown. It is an inch deep and a foot long. Find the diameter geometry? You said: the diameter of the material is two feet six inches. Technically speaking, the half-way is self-riding. If the depth is one, it will increase with the depth, that is, the material diameter. [10] When you open the door today, it's only one foot, not two inches. What is the width of the door? You said: one foot and one inch. Technically speaking: take a foot off the lot and multiply it by yourself, and the income will be divided into two and a half inches, and the income will increase by half, that is, the door will be wide open. Today, the height of a family is more than six feet eight inches wide, and the two corners are ten feet apart. What is the geometric relationship between height and width? You say: two feet eight inches wide; Nine feet six inches tall. Shu Yue: Make posts a matter of course. More than half, let yourself multiply, multiply, reduce, and the remaining half. Divided by prescription, the income is reduced by half, that is, the household width. Add it up to half, which is the height of the residents. [12] Today, some households don't know the height, the width and the length of the pole. Within four feet of it, within two feet of it, evil comes out. What are the dimensions of height, width and width? You say: six feet wide, eight feet high and ten feet wide. Technically, you can't multiply and multiply from and across, you can only divide by the formula. Income never adds up, household width, income does not add up, household height, the two do not add up, household width. 13. Today, bamboo is ten feet high, but when it finally reaches the ground, it is three feet away from the ground. What is the height of the folding machine? You said: four feet, eleven or twelve feet. Technically, you get what you want by taking advantage of the original. If you get what you want, you reduce the height of bamboo by half, and the remaining half, that is, the height of the loser, gets what you want. 14. Today, there are two people standing together. The rate of line A is seven, and the rate of line B is three. B drive east. One walks ten steps south, hates the northeast, and meets for the second time. May I ask the geometry of Party A and Party B? You said: b eastbound ten and a half steps; A bad thing needs 14 and a half steps. Shu yue: make seven multiply by oneself, three multiply by oneself, and divide into two, thinking that A is evil. The rate of evil deeds is reduced to seven times, and the rest are heading south. Take three times seven as the eastbound rate of B, ten steps southbound, multiply by the evil rate of A, and ten steps vice, multiply by the eastbound rate of B, each of which is true. In fact, if the southbound rate is 1, you get several lines each. 15. There is a saying called five steps and twelve steps. What is the geometry of the square in the question? You said: three steps, nine steps out of seventeen. Shu Yue: Sentence shares are combined into law, sentence shares are multiplied into reality, and reality is like law, so you can get a step. [16] There are eight-step sentences and fifteen steps today. What is the geometric relationship between the circle and the diameter in the question? You said: six steps. Shu yue: eight steps are sentences, fifteen steps are shares, and you seek strings for it. The combination of the three is the law, every sentence is multiplied by shares, and the times are true. Reality is like a method. 17. There are 200 steps in the city today, and every step is open. There are trees fifteen steps outside the east gate. Looking for the geometry of the south gate? You said: 666 steps, too half a step. Shu Yue: A few steps out of the East Gate is the Dharma, half the city is the truth, and actually one step is the Dharma. 18. Today, there is a city, which is seven miles from east to west and nine miles from north to south. There is a forest fifteen miles outside the east gate. Looking for the geometry of the south gate? You said: 3 15 steps. Shu Yue: The steps from the south to the east corner are calculated according to the steps from the east to the south corner. Take the number of wooden steps to the door as the method. Reality and law are one. [19] Today, there are cities that don't know the size, and they are all open. There are trees 30 steps outside the north gate and 750 steps outside the west gate. Ask about city geometry? You said: a mile. Art says: the steps of two doors are multiplied, so the four steps are true. If you divide the formula, you get the local formula. [20] Today, there are cities that don't know the size, and they are all open. There is a piece of wood twenty paces outside the north gate. Fourteen steps out of the south gate, turn west and see the wood at step 1775. Ask about city geometry? You said: 250 steps. Tip: multiply the number of steps out of the north gate by the number of steps to the west. This is true. And the number of steps out of the south gate is from the law, and the formula is divided, that is, the edge of the city. [2 1] Today, there are ten miles of land in the city, and all the schools are open. Both Party A and Party B are from downtown. B east exit; A south, I don't know how many steps, evil grinding northeast, suitable for B. rate A line five, B line three. What are the geometries of lines A and B? You said: A goes out of the south gate 800 steps, evil moves to the northeast 4,887.5 steps, B .. B goes east, 43 12.5 steps. Shu yue: make five times, three times, and one in two, which is the rate of evil deeds. The rate of evil deeds is less than five cyclists, and the rest are southbound. Take 3 times 5 as B. The eastbound rate of half a city, and multiply it by the southbound rate. If the eastbound rate is 1, the steps of the south gate are obtained. Increase the city by half, that is, southbound. It is true that those who seek strings in the south take advantage of the evil deeds rate, and those who seek easterners in the east take advantage of the eastbound rate. As good as the southbound speed. [22] There are trees to walk, but people don't know the distance. Set four tables, each one foot apart, so that the two tables on the left are in a straight line with the expected reference. From the right back table, the right front table is three inches. Seek wood to get rid of geometry? You said: 33 feet 3 inches, half an inch less. Shu yue: multiply one foot by itself, with three inches as the method and one as the method. [23] There lived a mountain to the west of the forest, whose height is unknown. The mountain is fifty-three miles to the wood, and the wood is nine feet high. People stood three miles east of the forest, looking at the end of the forest and the hillside. Human eyes are seven feet high. Find the geometry of mountain height? You say: 164 feet, 9 feet, 6 inches, that's half an inch. Shu yue: the height of the wood is reduced by seven feet, and the rest is multiplied by fifty-three miles. Take the people to Mulisan as the law. If the law remains unchanged, the height of the wood is the height of the mountain. Today, the diameter of the well is five feet, and I don't know its depth. Stand five feet above the well, look at the shore from the wooden end and enter four inches. Excuse me, well depth geometry? You said: five feet seven feet five inches. Technically speaking, the well diameter is set at five feet, minus four inches, and the rest is based on five-foot stumps. Take the four-inch diameter as the method. It's like growing an inch.