i only have 2 votes at all please upvote me it helps alot and when i reach i send a link to a secret website cant tell you what it is fine ill tell you what it is its a secret yt i made that will help alot

sadly none upvoted this one but i still reached it upvote when i hit 20 upvotes posting another one!

An angle smaller than 90 degrees. an obtuse angle is bigger than 90 degrees but smaller than 180 degrees. A right angle is exactly 90 degrees. A straight angle is exactly 180 degrees

How do I cite Khan Academy as a resource in APA style

URL: Give the full URL of the web page including the protocol (http:// or https://). To cite a Khan academy video in a reference entry in APA style 7th edition include the following elements: Title of the video: Only the first letter of the first word and proper nouns are capitalized.

Is there a angle bigger then 360

Yes, we can make angles larger than 360 degrees. Just imagine that the two rays making an angle could be rotated as much as you want. In one rotation, we get to 360 degrees. In two rotations, you can assume the measure to increase by 2 times, which gives us 720 degrees and so on. Angle measures can go up to infinite degrees.

Isn't it hard to tell without a protractor sometimes?

sometimes but usualy only if you are looking for precice exact numbers that havent bean rounded to the nearest place value. but if their are answer choises that are very different or you are looking for a ruf estemation, than you can usualy eyeball it.

if a angle is 91 degrees can it still be counted as a right angle

No, it would be an obtuse angle. Even if an angle were 90.1 degrees or 89.99 degrees, it wouldn't be a right angle, because a right angle measures exactly 90 degrees.

What is the angle between two hands of a clock at 4:30

If the total clock face represents 360°, then each number on the clock represents an angle of 30° and each minute, 6°. So at 4:30 the minute hand is at 30*6° = 180° and the hour hand is at 4.5*30° = 135°. Thus the angle between them is 180°-135° = 45°

Main content

Basic geometry and measurement

Course: Basic geometry and measurement > Unit 3

Lesson 3: Angle types

Identifying an angle

Name: Identifying an angle
Uploaded: 2013-10-23T17:27:19Z
Description: Sal matches pictures of angles to their degrees.

CCSS.Math:

4.MD.C.5

Google Classroom

Sal matches pictures of angles to their degrees. Created by Sal Khan.

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jackw
Posted 2 years ago. Direct link to jackw's post “whats a acute”
whats a acute
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- 🅻🅸🅶🅷🆃BENDER
  Posted 2 years ago. Direct link to 🅻🅸🅶🅷🆃BENDER's post “An angle smaller than 90 ...”
  An angle smaller than 90 degrees. an obtuse angle is bigger than 90 degrees but smaller than 180 degrees. A right angle is exactly 90 degrees. A straight angle is exactly 180 degrees
  Comment on 🅻🅸🅶🅷🆃BENDER's post “An angle smaller than 90 ...”
  (17 votes)
nathain
Posted 3 months ago. Direct link to nathain's post “i only have 2 votes at al...”
i only have 2 votes at all please upvote me it helps alot and when i reach i send a link to a secret website cant tell you what it is fine ill tell you what it is its a secret yt i made that will help alot
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(14 votes)
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- nathain
  Posted 3 months ago. Direct link to nathain's post “sadly none upvoted this o...”
  sadly none upvoted this one but i still reached it upvote when i hit 20 upvotes posting another one!
  Comment on nathain's post “sadly none upvoted this o...”
  (10 votes)
brownja
Posted 8 years ago. Direct link to brownja's post “Is there a angle bigger ...”
Is there a angle bigger then 360
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(5 votes)
Answer
- Rashik
  Posted 6 years ago. Direct link to Rashik's post “Yes, we can make angles l...”
  Yes, we can make angles larger than 360 degrees. Just imagine that the two rays making an angle could be rotated as much as you want.
  In one rotation, we get to 360 degrees. In two rotations, you can assume the measure to increase by 2 times, which gives us 720 degrees and so on.
  Angle measures can go up to infinite degrees.
  Comment on Rashik's post “Yes, we can make angles l...”
  (7 votes)
alp822
Posted 6 years ago. Direct link to alp822's post “Isn't it hard to tell wit...”
Isn't it hard to tell without a protractor sometimes?
Button navigates to signup pageComment on alp822's post “Isn't it hard to tell wit...”
(5 votes)
Answer
- unrealistic expectations
  Posted 2 years ago. Direct link to unrealistic expectations's post “sometimes but usualy only...”
  sometimes but usualy only if you are looking for precice exact numbers that havent bean rounded to the nearest place value. but if their are answer choises that are very different or you are looking for a ruf estemation, than you can usualy eyeball it.
  Button navigates to signup page
  (6 votes)
nathain
Posted 3 months ago. Direct link to nathain's post “so i ended up reaching 17...”
so i ended up reaching 17 upvotes here you go to theses (If the total clock face represents 360°, then each number on the clock represents an angle of 30° and each minute, 6°. So at
4:30
the minute hand is at 30*6° = 180° and the hour hand is at 4.5*30° = 135°. Thus the angle between them is 180°-135° = 45°) by nathain.w
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(7 votes)
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Troxellchad318
Posted 8 years ago. Direct link to Troxellchad318's post “if a angle is 91 degrees ...”
if a angle is 91 degrees can it still be counted as a right angle
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(5 votes)
Answer
- Hope Langworthy
  Posted 8 years ago. Direct link to Hope Langworthy's post “No, it would be an obtuse...”
  No, it would be an obtuse angle. Even if an angle were 90.1 degrees or 89.99 degrees, it wouldn't be a right angle, because a right angle measures exactly 90 degrees.
  Button navigates to signup page
  (3 votes)
Dianne Wawrzyniak
Posted 6 years ago. Direct link to Dianne Wawrzyniak's post “How do I cite Khan Academ...”
How do I cite Khan Academy as a resource in APA style
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(6 votes)
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- unrealistic expectations
  Posted 2 years ago. Direct link to unrealistic expectations's post “URL: Give the full URL of...”
  URL: Give the full URL of the web page including the protocol (http:// or https://). To cite a Khan academy video in a reference entry in APA style 7th edition include the following elements: Title of the video: Only the first letter of the first word and proper nouns are capitalized.
  Button navigates to signup page
  (2 votes)
Sarah Watkeys
Posted 6 years ago. Direct link to Sarah Watkeys's post “I've watched this video t...”
I've watched this video three times and it's still not marked as having been watched. The subtitles aren't showing either so I'm having to follow the transcript. I'm on Google Chrome on the iPad, if that makes a difference
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nancy.tc21th
Posted 6 years ago. Direct link to nancy.tc21th's post “but,Sal,it does NOT make ...”
but,Sal,it does NOT make any sense, if a 60 degrees is more than 30 degrees,it is LESS than 90 degrees,isn't it?
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geetash2011
Posted 8 years ago. Direct link to geetash2011's post “What is the angle between...”
What is the angle between two hands of a clock at
4:30
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(2 votes)
Answer
- Thomas B
  Posted 8 years ago. Direct link to Thomas B's post “If the total clock face r...”
  If the total clock face represents 360°, then each number on the clock represents an angle of 30° and each minute, 6°. So at
  4:30
  the minute hand is at 30*6° = 180° and the hour hand is at 4.5*30° = 135°. Thus the angle between them is 180°-135° = 45°
  Button navigates to signup page
  (3 votes)

Video transcript

Match these angles with their measures. There should be one angle in each category. We have 30 degrees, 60 degrees, 90 degrees, and 180 degrees. So there's a few that are very easy to spot out. This angle right over here, it makes a complete line. So this is clearly 180 degrees. So this one's 180 degrees. The other one that might jump out at you is this one right over here. This is clearly a right angle, or a 90-degree angle right over here. So this is 90 degrees. And so we have to think which of these is 30 and which is 60 degrees? Well, just by comparing it that way, you know that the one that opens out more is going to be 60 degrees and the one that opens out less is going to be 30 degrees. And you can see that this, the opening here, is half the size of the opening right over here. So it makes sense that this is 30, this is 60, and it also makes sense that this angle is 1/3 the measure of this angle right over here, that this is 90 degrees. And then if you were to double this, then this part of the angle would go all the way out, and you would get to the 180 degrees. So let's check our answer and make sure we actually got this one right. Let's do one more, just for fun. Which of these angles has a measure of 60 degrees? So there's a couple that we can immediately rule out. This angle here is clearly more than 90 degrees. It's an obtuse angle. This angle here is 180 degrees, so we're going to have to pick between these two. And we can assume that these are all at scale. So if we know that a right angle would have this line straight up and down, this looks like it's 2/3 of the way there. So I would go with this one right over there. Now, you might say, well, what about this one? Well, this one looks like it's about 1/3 of a right angle. If we were to do 2/3, then 3/3, it looks like we would get to a right angle. So this one looks much closer to 30 degrees. So which of these angles has a measure of 60? That one right over there. You could immediately rule out that one and that one, and then these take a little bit closer inspection.