# What information do you need to complete a rotation?

## What information do you need to complete a rotation?

To perform a geometry rotation, we first need to know the point of rotation, the angle of rotation, and a direction (either clockwise or counterclockwise). A rotation is also the same as a composition of reflections over intersecting lines.

## What is the rule for a 270 degree rotation?

Coordinate Rules for Rotations about the origin: For a rotation of 1800 (x,y)  (-x, -y). For a rotation of 2700 (x,y)  (-y, x). When a point (x, y) is rotated counterclockwise about the origin, the following rules are true: For a rotation of 900 (x,y)  (-y, x).

What are the properties that identify a rotation?

The following are the three basic properties of rotations :

• A rotation maps a line to a line, a ray to a ray, a segment to a segment, and an angle to an angle.
• A rotation preserves lengths of segments.
• A rotation preserves measures of angles.

### What are the examples of rotation?

An example of rotation is the earth’s orbit around the sun. An example of rotation is a group of people holding hands in a circle and walking in the same direction.

### What is the formula for a 90 degree clockwise rotation?

If you want to do a clockwise rotation follow these formulas: 90 = (b, -a); 180 = (-a, -b); 270 = (-b, a); 360 = (a, b).

What are the rules for clockwise 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)

#### What are the rules of rotation?

When you rotate the image using the 90 degrees rule, the end points of the image will be (-1, 1) and (-3, 3). The rules for the other common degree rotations are: For 180 degrees, the rule is (x, y) ——–> (-x, -y) For 270 degrees, the rule is (x, y) ——–> (y, -x)

#### What clockwise rotation would be the same as an counterclockwise rotation of 90?

The answer would be, A clockwise rotation of 90 is the same as a counterclockwise rotation of 270.

What are the coordinates of point F after a 90 clockwise rotation about the origin?

if F is rotated 90° about the origin in the clockwise (negative) direction, the image is the point F'(3, 0), as shown with the red line segments. if F is rotated 90° about the origin in the counterclockwise (positive) direction, the image is the point F'(-3, 0), as shown with the green line segments.

## Why is clockwise to the right?

The reason that clocks turn clockwise has to do with sundials, which were the first clocks. In the northern hemisphere, the earth rotates counter-clockwise, which means that from our point of view the sun appears to move across the sky in a clockwise directon.

## Is clockwise rotation positive or negative?

Counterclockwise is the positive rotation direction and clockwise is the negative direction. For example, a torque that rotates an object counterclockwise is a positive torque (see figure 6 below).

Is clockwise tighten or loose?

The easiest way to remember which direction tightens and which one loosens is the old axiom “righty-tighty and lefty-loosey.” This means that turning most threaded things right, or clockwise, tightens them (righty-tighty) and turning them to the left, or counterclockwise, loosens them (lefty-loosey).

### Which way is tighten and loosen?

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.

### What does clockwise mean?

: in the direction in which the hands of a clock rotate as viewed from in front or as if standing on a clock face.

Which way do you turn an allen key to loosen?

Taking care to use the correct size Allen wrench, use the short arm in the socket, rotating counterclockwise unless the screw has left-hand threads, to break the screw loose if it’s very tight.

#### How can I open my Allen key without key?

1. Find a bolt whose head is the required size. Insert the bolt head half-way into the socket.
2. Find a bolt whose head is the required size. Turn two nuts on and counter-tighten them (jam them together).
3. You can get a decent set of hex wrenches for \$10 – \$15; possibly much less if you wait for a sale.

#### How do you remove a rounded nut from a tight space?

Best Methods for Removing Rounded Nuts & Bolts in Tight Spaces:

1. Use a Damaged Bolt Remover Socket Set– the best is the Irwin Damaged Extractor Set on Amazon.
2. Hammer on a smaller socket and remove the rounded bolt.
3. Use Vice Grips and grab the fastener as tight as possible and remove normally.

How is a socket attached to a ratchet?

The socket is placed on the square extension or driver of the ratchet. Once it’s secured to the ratchet the user can loosen or tighten a bolt or nut while the socket remains in place by just turning the handle of the ratchet.

## How do you remove a nut with a rounded head?

Begin with an oscillating tool to cut a groove across the top of the rounded bolt head. Place a flat, screwdriver tip on the impact wrench. Push down on the impact wrench, and pull the trigger to back out the bolt.

## Which wrench is used to loosen hex fasteners?

Flare Nut Wrench

What is another name for a hex wrench?

A hex key, also known as an Allen key or Allen wrench, is a small handheld tool that’s used for for driving bolts and screws with a hexagonal socket. They are available in many different sizes, though they all have the same hexagonal-shaped tip.

### What are the loosening and tightening tools?

Maintenance Tools for Tightening and Loosening

Tool Name Description
Adjustable wrenches with scale Adjustable wrenches with scale to tighten wide range of nuts.
Hook wrenches with square nose for ring nuts Hook wrenches with square nose used mainly to loose and tighten bearing locking nut.

### Can I use pliers instead of a wrench?

Although pliers can be used to tighten and loosen nuts, this is a task better suited to the wrench. Pliers tend to damage the surfaces of fasteners and are usually more difficult to use than a properly-sized wrench.

What to use when you dont have a wrench?

What to Use if You Don’t Have a Wrench

1. Duck tape. Duct tape is useful in almost any situation but you may be surprised to learn that you can use it to loosen bolts.
2. Two coins. Who would think that money can be used as a makeshift tool?
3. Zip-tie.
4. Another nut and bolt.

#### What’s the difference between a socket wrench and a ratchet?

A socket wrench is a type of wrench (spanner in British English) that inserts into a socket to turn a fastener, typically in the form of a nut or bolt. The most prevalent form is the ratcheting socket wrench, often informally called a ratchet.

#### What do you do if you don’t have pliers?

If you need pliers to grip onto something large, you can try a pair of stainless-steel kitchen tongs, although you may struggle with torque. If you think you can manage it with your hands but need a better grip, try using a silicone kitchen mitt or one of those jar-opening pads.