# math

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a man walks 8km north and 5km in a direction east of north.find the distance from the starting point

• math -

8kmN moves (0,8)
5km NE moves (3.5,3.5)

add them up to get (3.5,11.5)

distance is thus √(3.5^2 + 11.5^2) = 12.0

• math -

This is a pythagorean theorem problem:

a^2 + b^2 = c^2

You have two sides and you are going to solve for c.

• math -

11

• physics -

1. A man walks 10km east and 20km south the displacement of the man from initial position
2. In figure below R= 30, find x and Y respectively.

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