**Terms in this set (9)**

- (-y, x) 90 degree rotation counterclockwise around the origin.
- (y, -x) 90 degree rotation clockwise about the origin.
- (-x, -y) 180 degree rotation clockwise and counterclockwise about the origin.
- (-y, x) 270 degree rotation clockwise about the origin.
- (y, -x)
- (x, -y)
- (-x, y)
- (y, x)

In this way, what is the formula for rotating 90 degrees counterclockwise?

–**90 degrees**, the rule is (x, y) ——–> (y, -x) -180 **degrees**, the rule is (x, y) ——–> (-x, -y) -270 **degrees**, the rule is (x, y) ——–> (-y, x)

Beside above, what is the formula for rotating 180 degrees counterclockwise? **180 degrees** is (-a, -b) and 360 is (a, b). 360 **degrees** doesn't change since it is a full **rotation** or a full circle. Also this is for a **counterclockwise rotation**. If you want to do a clockwise **rotation** follow these **formulas**: 90 = (b, -a); **180** = (-a, -b); 270 = (-b, a); 360 = (a, b).

Thereof, which way is counterclockwise to the left or right?

Answer: **counter clockwise** the is rotation or movement of an object which is in the opposite **direction** of any clock. When we see from the top, the circular rotation moves to the **left**, and from the bottom rotation moves to the **right**.

What are the rules for counterclockwise rotations?

**Terms in this set (9)**

- (-y, x) 90 degree rotation counterclockwise around the origin.
- (y, -x) 90 degree rotation clockwise about the origin.
- (-x, -y) 180 degree rotation clockwise and counterclockwise about the origin.
- (-y, x) 270 degree rotation clockwise about the origin.
- (y, -x)
- (x, -y)
- (-x, y)
- (y, x)

## Which way is clockwise?

**clockwise**(typically abbreviated as CW) motion is one that proceeds in the same direction as a clock's hands: from the top to the right, then down and then to the left, and back up to the top.

## How do you describe rotation?

**rotation**is a turn of a shape. A

**rotation**is described by the centre of

**rotation**, the angle of

**rotation**, and the direction of the turn. The centre of

**rotation**is the point that a shape rotates around. Each point in the shape must stay an equal distance from the centre of

**rotation**.

## What is a 90 degree turn?

**90**–

**degree turn**is one-quarter of

**turn**regardless of direction. If a person imagines himself standing looking straight ahead and then

**turning**to face the right side or the left side, he has made a

**90**–

**degree turn**. A circle contains 360

**degrees**.

## How do you write a reflection Rule?

**write a rule**for this

**reflection**you would

**write**: rx−axis(x,y) → (x,−y). Notation

**Rule**A notation

**rule**has the following form ry−axisA → B = ry−axis(x,y) → (−x,y) and tells you that the image A has been

**reflected**across the y-axis and the x-coordinates have been multiplied by -1.

## What is a 270 rotation?

**Rotating**a Triangle

**270**Degrees Counterclockwise:

One such **rotation** is to **rotate** a triangle **270**° counterclockwise, and we have a special rule that we can use to do this that is based on the fact that a **270**° counterclockwise **rotation** is the same thing as a 90° clockwise **rotation**.

## What is the rule for translation?

**translation**, every point of the object must be moved in the same direction and for the same distance. When you are performing a

**translation**, the initial object is called the pre-image, and the object after the

**translation**is called the image.

## How do you graph rotation?

**Graph**A(5, 2), then

**graph**B, the image of A under a 90° counterclockwise

**rotation**about the origin. Rule for 90° counterclockwise

**rotation**: A (5, 2) B (- 2, 5) Now

**graph**C, the image of A under a 180° counterclockwise

**rotation**about the origin.

## How do you rotate around a point?

**point**(a, b)

**rotated around a point**(x, y) 90 degrees will transform to

**point**(-(b-y) + x, (a-x) + y). A

**point**(a, b)

**rotated around a point**(x, y) 180 degrees will transform to

**point**(-(a – x) + x, -(b – y) + y). A

**point**(a, b)

**rotated around**the origin 270 degrees will transform to

**point**(b – y + x, -(a – x) + y).

## What is a rotation in math?

**rotation**is a transformation that turns a figure about a fixed point called the center of

**rotation**. • An object and its

**rotation**are the same shape and size, but the figures may be turned in different directions. • Rotations may be clockwise or counterclockwise.

## Which way is 90 degrees clockwise?

**90**° about the origin in

**clockwise direction**when point M (h, k) is rotated about the origin O through

**90**° in

**clockwise direction**. The new position of point M (h, k) will become M' (k, -h). Worked-out examples on

**90 degree clockwise**rotation about the origin: 1.

## Which way does the fan switch go in the winter?

**Fan Direction**for Warm

**Winter**Comfort

In the **winter**, ceiling fans **should** rotate clockwise at a low **speed** to pull cool air up. The gentle updraft pushes warm air, which naturally rises to the ceiling, down along the walls and back the floor.

## Why is clockwise to the right?

**clockwise**“, meaning “following the motion of the hands of the clock”. Since the hands of the clock appear to move to the

**right**, “

**clockwise**” and “

**right**” became associated, and are treated as interchangeable when referring to circular motion.