what is the difference between translation and reflection?

Translation: moving the origin of a polygon, but retaining the direction of each axis. Reflection: a polygon's "mirror image" over a specified line. =D

How would you define a regular polygon?

Regular Polygon : If all angles are equal and all sides are equal, then it is a regular polygon (otherwise it is "irregular").

i couldnt load the video

Try using Chrome if you were using Internet Explorer.

Is a polygon a four sided shape

A polygon is any closed shape with any number of straight, equal, sides. A quadrilateral has 4 sides. Hope this helps!

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Geometry (all content)

Course: Geometry (all content) > Unit 10

Lesson 9: Old transformations videos

Performing translations (old)

Name: Performing translations (old)
Uploaded: 2013-08-14T22:38:32Z
Description: An older video where Sal uses the interactive widget to find the image of a rectangle under a translation.

Google Classroom

An older video where Sal uses the interactive widget to find the image of a rectangle under a translation. Created by Sal Khan.

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stephanie lemon
Posted 10 years ago. Direct link to stephanie lemon's post “what is the difference be...”
what is the difference between translation and reflection?
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(7 votes)
Answer
- Puja Vasan
  Posted 9 years ago. Direct link to Puja Vasan's post “Translation: moving the o...”
  Translation: moving the origin of a polygon, but retaining the direction of each axis.
  
  Reflection: a polygon's "mirror image" over a specified line.
  
  =D
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  (8 votes)
Justin P.
Posted 8 years ago. Direct link to Justin P.'s post “can polygons be circular”
can polygons be circular
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(4 votes)
Answer
- Cora Fajardo
  Posted 8 years ago. Direct link to Cora Fajardo's post “No way... a polygon is de...”
  No way... a polygon is defined as what? How about a circle? You can bend into a polygon a circular wire; but geometrically, the two concepts are as different as night and day! :-)
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  (0 votes)
Gwendolyn
Posted 8 years ago. Direct link to Gwendolyn's post “Do polygons have curves?”
Do polygons have curves?
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(5 votes)
Answer
stupidjpo
Posted 8 years ago. Direct link to stupidjpo's post “I want to practice the sk...”
I want to practice the skills and watch the videos only when i need help. Where are the exercises?
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(3 votes)
Answer
Bhavana Suresh
Posted 10 years ago. Direct link to Bhavana Suresh's post “How would you define a re...”
How would you define a regular polygon?
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(2 votes)
Answer
- Bilal
  Posted 10 years ago. Direct link to Bilal's post “Regular Polygon : If all...”
  Regular Polygon :
  
  If all angles are equal and all sides are equal, then it is a regular polygon (otherwise it is "irregular").
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  (3 votes)
Omar Moreno
Posted 8 years ago. Direct link to Omar Moreno's post “i couldnt load the video”
i couldnt load the video
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(2 votes)
Answer
- p.m.
  Posted 7 years ago. Direct link to p.m.'s post “Try using Chrome if you w...”
  Try using Chrome if you were using Internet Explorer.
  Button navigates to signup page
  (2 votes)
hope.peige
Posted 8 years ago. Direct link to hope.peige's post “Is a polygon a four sided...”
Is a polygon a four sided shape
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(2 votes)
Answer
- me
  Posted 8 years ago. Direct link to me's post “A polygon is any closed s...”
  A polygon is any closed shape with any number of straight, equal, sides. A quadrilateral has 4 sides.
  Hope this helps!
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  (2 votes)
tarynny99
Posted 10 years ago. Direct link to tarynny99's post “How would one describe a ...”
How would one describe a translation without a coordinate graph given, or coordinate points given for the vector? Also, would you use compass directions to describe the translation?
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(2 votes)
Answer
Jackie Neumaier
Posted 8 years ago. Direct link to Jackie Neumaier's post “Do translations have to b...”
Do translations have to be on the coordinate plane?
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(2 votes)
Answer
- Peter Kolb
  Posted 8 years ago. Direct link to Peter Kolb's post “Good question. A transl...”
  Good question.
  A translation occurs anytime a "preimage" is shifted up/down and left/right to a new location.
  It's easiest to track a translation on a coordinate plane because we can make sure all corners are shifting the same numerical value.
  However, you can translate a doodle on a blank piece of paper simply by recreating that exact doodle on another location on your paper - maybe down to the right.
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  (1 vote)
danaamawi
Posted 8 years ago. Direct link to danaamawi's post “How to find if it is a ri...”
How to find if it is a rigid motion
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(2 votes)
Answer
- Winkler, Rachel
  Posted 8 years ago. Direct link to Winkler, Rachel's post “If the figure stays the s...”
  If the figure stays the same shape and size then its a rigid motion. So any rotation, translation, and reflection are rigid motions.
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  (1 vote)

Video transcript

What is the image of the polygon below after the translation is capital T with the subscript 5 comma 2? So that means let's translate 5 in the horizontal direction and 2 in the vertical direction. So let's do that. So I'm going to focus on this point right over here. So that point is at the point 3 comma 3. If I want to translate five in the horizontal direction, the x value is going to get to 8. So the x value is going to 1, 2, 3, 4, 5. And then we want to increase the y value by 2. 1, 2. Let's check our answer. Let's do a couple more of these. That was lot of fun. So here we need to shift it by negative 8 in the horizontal direction. So this one right over here, it's x value is 0, so we need to go essentially negative 8, negative 1, negative 2, or we move to the left 1, 2, 3, 4, 5, 6, 7, 8. And then we have to move it down by 2. So we have to move down 1, move it down 2. And we're done.