A clock doesn't normally go this way.
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Counterclockwise is the opposite of the normal movement of a clock.
Cool, so now you understand what "rotate clockwise 90°" means in the treasure map.
Rotate clockwise 90° means to turn right to face your shoulder.
Now, let's learn about what "Face north" means.
To "Face north", you'll need a compass.
Tip: most smartphones and tablets have compass apps.
A compass tells you what cardinal direction you're facing.
The four main cardinal directions are north, south, east, and west.
They're often written using the first letter of their names.
North always points to the North Pole, the top of our planet.
Tip: A compass is just a magnet that always points to the north pole, because our planet is kind of like a big magnet too!
South points to the South Pole, the bottom of our planet.
The sun rises in the east, and sets in the west.
You can use a compass to help you figure out if you're going in the right direction in the world.
There are halfway points in between the main cardinal directions.
Knowing these directions will help you get around the world.
The compass directions north, south, east, and west should be lowercase unless they are part of a proper noun, like the North Pole, or at the start of a sentence.
Now, let's look at how different turns can change your cardinal direction.
Let's say you're facing north.
You turned clockwise to face east.
What fraction of a full turn did you make?
Yes. You made 1/4 of a full turn.
Tip: this is also called a 90° turn.
You're now facing east.
Now, let's say you want to face west by turning counterclockwise.
What angle did you turn?
Yes. You turned 180° counterclockwise.
You're now facing west.
Where will you face if you make a 270° turn clockwise?
Correct! You'll now face south.
Excellent job learning about turns and compass directions.
Now, you can navigate around the world with a compass!
Imagine Jenny is standing at the center of her town.
If she made a 180° turn counterclockwise, where will she be facing?
Correct! She'd be facing the school.
Tip: A 180° turn is half of a full turn.
If she turns clockwise to face the ice cream shop, what angle must she turn?
You got it. A 90° degree turn.
If she decides to make a 360° turn counterclockwise, where will she be facing?
Very good. She'd be facing the ice cream shop again.
Tip: A 360° turn is a full turn. Whether you do it clockwise or counterclockwise, you would still end up where you started.
For more information, please visit what is clockwise and counterclockwise.
Now, you're ready to ace the practice.
This article is about the direction. For other uses, see Clockwise (disambiguation)
The clockwise direction
The counterclockwise or anticlockwise direction
Two-dimensional rotation can occur in two possible directions or senses of rotation. Clockwise motion (abbreviated CW) proceeds in the same direction as a clock's hands relative to the observer: from the top to the right, then down and then to the left, and back up to the top. The opposite sense of rotation or revolution is (in Commonwealth English) anticlockwise (ACW) or (in North American English) counterclockwise (CCW).[1] Three-dimensional rotation can have similarly defined senses when considering the corresponding angular velocity vector.
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Viewed from the north, Earth rotates anticlockwise or counterclockwiseBefore clocks were commonplace, the terms "sunwise" and "deasil", "deiseil" and even "deocil" from the Scottish Gaelic language and from the same root as the Latin "dexter" ("right") were used for clockwise. "Widdershins" or "withershins" (from Middle Low German "weddersinnes", "opposite course") was used for counterclockwise.[2]
The terms clockwise and counterclockwise can only be applied to a rotational motion once a side of the rotational plane is specified, from which the rotation is observed. For example, the daily rotation of the Earth is clockwise when viewed from above the South Pole, and counterclockwise when viewed from above the North Pole (considering "above a point" to be defined as "farther away from the center of earth and on the same ray").
The shadow of a horizontal sundial in the Northern Hemisphere rotates clockwiseClocks traditionally follow this sense of rotation because of the clock's predecessor: the sundial. Clocks with hands were first built in the Northern Hemisphere (see Clock), and they were made to work like horizontal sundials. In order for such a sundial to work north of the equator during spring and summer, and north of the Tropic of Cancer the whole year, the noon-mark of the dial must be placed northward of the pole casting the shadow. Then, when the Sun moves in the sky (from east to south to west), the shadow, which is cast on the sundial in the opposite direction, moves with the same sense of rotation (from west to north to east). This is why hours must be drawn in horizontal sundials in that manner, and why modern clocks have their numbers set in the same way, and their hands moving accordingly. For a vertical sundial (such as those placed on the walls of buildings, the dial being below the post), the movement of the sun is from right to top to left, and, accordingly, the shadow moves from left to down to right, i.e., counterclockwise. This effect is caused by the plane of the dial having been rotated through the plane of the motion of the sun and thus the shadow is observed from the other side of the dial's plane and is observed as moving in the opposite direction. Some clocks were constructed to mimic this. The best-known surviving example is the Münster astronomical clock, whose hands move counterclockwise.
Occasionally, clocks whose hands revolve counterclockwise are sold as a novelty. One historic Jewish clock was built that way in the Jewish Town Hall in Prague in the 18th century, using right-to-left reading in the Hebrew language. In under Bolivian president Evo Morales, the clock outside the Legislative Assembly in Plaza Murillo, La Paz, was shifted to counterclockwise motion to promote indigenous values.[3]
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Typical nuts, screws, bolts, bottle caps, and jar lids are tightened (moved away from the observer) clockwise and loosened (moved towards the observer) counterclockwise in accordance with the right-hand rule.
Conventional direction of the axis of a rotating bodyTo apply the right-hand rule, place one's loosely clenched right hand above the object with the thumb pointing in the direction one wants the screw, nut, bolt, or cap ultimately to move, and the curl of the fingers, from the palm to the tips, will indicate in which way one needs to turn the screw, nut, bolt or cap to achieve the desired result. Almost all threaded objects obey this rule except for a few left-handed exceptions described below.
The reason for the clockwise standard for most screws and bolts is that supination of the arm, which is used by a right-handed person to tighten a screw clockwise, is generally stronger than pronation used to loosen.
Sometimes the opposite (left-handed, counterclockwise, reverse) sense of threading is used for a special reason. A thread might need to be left-handed to prevent operational stresses from loosening it. For example, some older cars and trucks had right-handed lug nuts on the right wheels and left-handed lug nuts on the left wheels, so that, as the vehicle moved forward, the lug nuts tended to tighten rather than loosen. For bicycle pedals, the one on the left must be reverse-threaded to prevent it unscrewing during use. Similarly, the flyer whorl of a spinning wheel uses a left-hand thread to keep it from loosening. A turnbuckle has right-handed threads on one end and left-handed threads on the other. Some gas fittings are left-handed to prevent disastrous misconnections: oxygen fittings are right-handed, but acetylene, propane, and other flammable gases are unmistakably distinguished by left-handed fittings.
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In trigonometry and mathematics in general, plane angles are conventionally measured counterclockwise, starting with 0° or 0 radians pointing directly to the right (or east), and 90° pointing straight up (or north). However, in navigation, compass headings increase clockwise around the compass face, starting with 0° at the top of the compass (the northerly direction), with 90° to the right (east).
A circle defined parametrically in a positive Cartesian plane by the equations x = cos t and y = sin t is traced counterclockwise as the angle t increases in value, from the right-most point at t = 0. An alternative formulation with sin and cos swapped gives a clockwise trace from the upper-most point.
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In general, most card games, board games, parlor games, and multiple team sports play in a clockwise turn rotation in Western Countries and Latin America and there is typically resistance to playing counterclockwise. Traditionally, and for the most part today, turns pass counterclockwise in many Asian countries. In Western countries, when speaking and discussion activities take place in a circle, the position of the speaker tends to move clockwise, even though there is no requirement that it do so. Curiously, unlike with games, there is usually no objection if turns begin to move counterclockwise.[citation needed]
Notably, the game of baseball is played counterclockwise.
Alternative, normal right/left rotation[
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As an alternative to using a clock to describe the rotation of a body, it is possible to use the right/left hand rule to determine the rotation. The thumb shall point in the normal direction of the surface in question and the four remaining fingers in the direction of the rotation of the surface. The resulting direction of the rotation is thereby[citation needed]
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