"Determine Location" Position and Coordinates PPT Courseware

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"Determine Location" Position and Coordinates PPT Courseware

(1) How can I find the location indicated on the movie ticket in the cinema?

(2) On a movie ticket, what is the difference in meaning of the "6" in "Row 6, No. 3" and "Row 3, No. 6"?

(3) If "No. 3 in row 8" is recorded as (8,3), then how to express "No. 8 in row 3"? What does (5,6) mean?

In a movie theater, how much data is generally required to determine a seat? Why?

Example analysis

As shown in the picture, it is a schematic diagram of the confrontation between the enemy and our ships in a certain naval battle (1cm in the picture represents 20 nautical miles). For our submarine O:

(1) What are the targets in the direction 40˚ north by east?

What other data is needed to determine the location of enemy ship B?

(2) How many enemy ships are 20 nautical miles away from our submarine?

(3) How much data is needed to determine the position of each enemy ship?

To determine the position of each enemy ship, two pieces of data are required: range and azimuth. For example, for our submarine O, enemy ship A is due south, with a distance of 1cm on the picture; enemy ship B is 40° north by east, with a distance of 1.4cm on the picture; enemy ship C is due east , the distance in the picture is 1cm.

Practice in class

1. According to Xinhua News Agency, at 3:40 a.m. on July 28, 1976, a major earthquake measuring 7.8 on the Richter scale occurred in Tangshan City, Hebei Province, my country. The epicenter was located in the Jixiang Road area of ​​Tangshan City, which is 39˚ 38' north latitude and 118 east longitude. ˚11'. In this earthquake, 240,000 people died. It was one of the greatest disasters caused by earthquakes in history.

discussion one discussion

(1) What other examples in life use similar methods to determine location? Give two examples.

(2) In a plane, two pieces of data are generally required to determine the position of an object.

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Update Time: 2024-11-22

This template belongs to Mathematics courseware Beijing Normal University eighth grade first volume mathematics industry PPT template

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