Предмет: Математика, автор: Аноним

1192. Решите задачу с помощью урав-
нения. Угол МОК равен 120°
(рис. 7.9). Внутри угла проведен
луч OD. Угол MOD больше угла
DOK на 50°. Сколько градусов со-
держит угол DОК?
Пожалуйста пришлите ответ очень срочно нужно

Ответы

Автор ответа: gumbet
83

Ответ:

пусть угол ДОК--х    тогда угол МОД---х+50  а угол МОК=120 град    

х+х+50=120  

2х=120-50  

2х=70

 х=70:2

 х=35 град--угол ДОК  

35+50=85 град угол МОД

Пошаговое объяснение:


Elekaycrow: Спасибо Большое :3
olesyagricina: спасибо большое
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The word money comes from the name of the Roman goddess in whose temple silver coins were made.                 Money did not always look like our money. Sometimes it was a ring or an ornament, or just a slab of gold or silver, from which coins were v made. Still later cheaper metals replaced gold and silver.                 British coins are made in the Royal Mint. The metals come in the form of slabs. The right proportion of each metal for the sort of coin being made, are put into large graphite pots and melted in very hot furnaces for two hours. and left to cool. The bars of metals go throught heavy rollers and become thin metal slrips. The strips go into another machine which stamps out circles in them. The circles drop into a box. The waste metal is collected and remelted.                 Next the circles are annealed: they are heated to red-hot and then dropped into cold water. During the process of annealing the copper takes some of the oxygen from the air. As a result a thin layer of copper oxide appears on the surface of the circle, which is removed with a weak solution of sulphuric acid.                 While hot the circles are stamped, and also pass through a special pressing machine which raises a rim cm the coin. (The rim will help the coin to live longer.) In stamping the softish circle of the future coin is pressed above and below by two pieces of metal called dies. The upper die stamps the heads of the coin and the lower die stamps the tails. While being stamped the coin becomes hard again. When the coins are ready they arc Counted on an automatic machine, and inspected by hand. Then they are Recounted and bagged up by machine, tied up and weighed and sent to the bank.