# How many points are needed to define a ray

How many points define a ray?

Definition of a ray - a type of line. Naming of rays Rays are commonly named in two ways: By two points. In the figure at the top of the page, the ray would be called AB because starts at point A and passes through B on its way to infinity. A ray is defined as a portion of a line, because it begans at a specific point while line doesn't begin or end at a specific point. The way to define a ray is using two points, the initial where the ray begins and the second indicates the orientation. Therefore, there are needed 2 points to name a ray.

Asked by Wiki User. You need two points. Two points are sufficient. You need more points than everyone else in order to win. You need two. It need not mamy any, but can have as many as the number of points on the start.

Just like line segments or lines, you how many points are needed to define a ray need two points to name them. Line You need points. We need more information, such as "what fitness logs are you referring to" in order to answer your question. Ask Question. See Answer. Top Answer. Wiki User Answered Related Questions. How many point do you need in order to name a ray? How many pointe do you need in order to name a ray? How many points do you need to win? How many points do you need to name a ray segment?

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In geometry, a ray can be defined as a part of a line that has a fixed starting point but no end point. It can extend infinitely in one direction. On its way to infinity, a ray may pass through more than one point. When naming a ray, it is denoted by drawing a small ray on top of the name of the ray. Ray Definition In Geometry A ray can be thought of as being a snippet or segment of a line. In plane geometry, a ray is easily constructed with two points. One will be an endpoint, the start of the ray. Aug 19,  · How many points define a ray? If it two? Or just the starting point? Answer Save. 3 Answers. Relevance. A Rainy Knight. Lv 4. 1 decade ago. Favorite Answer. I believe it is two - the endpoint, and at least one other to determine the direction. 0 0. marchildon. Lv 4. 4 years ago. Define A Ray.

Pages: Previous 1 2 3 Next. Ok sounds good. One, who adopts patience, will never be deprived of success though it may take a long time to reach him. We need two points to define a line. A different way to say this is that if you have two points, you will need at least a line to hold them. In this sense, what do you need at least three points to define? Which one is longer? I like your answer. Consider two lines that intersect in a single point in a plane. How many rays would it take to draw the same picture?

Plane geometry as we study it now can be traced back to Euclid, and his book The Elements. A-A point has no dimensions, it only defines a place in space B-Points are only on lines, never by themselves C-A point is only important if it defines a shape D-Points are very big E-Points are very small F-Points stand alone and have nothing more to them.

I also think answer A! Imagine you printed out figure 1 and enlarged it with a photocopier, then compared the two figures. Everything would appear larger. Would point B really be larger? A-Yes, it would become a planet B-No, because the line it is on would not be bigger C-Yes, because everything would be bigger D-No, because a point has no dimensions to enlarge E-Yes, because point B is on a line segment F-No, because I think the answer choice should be F.

The photocopier makes it bigger, but we must think of the point a dimensionless. So it would not really in our Euclidean World be larger. Only if you have an additional point not on the line B. Only if it is a long line C. Yes, because lines are big D. Yes, because a line has an infinite number of points E. Only if the line has three points on it F Only if the line has 6 or more points on it. Not D. To make a plane you need a point that is not on the line as well.

That is answer??? A-Yes, because three points are enough B-Yes, because planes are infinite C-Only if the points are on the same line D-No, because all the points may be on the same line E-No, you might have an angle F- No, you might have a triangle. Take care here. Three points only make a plane if they are not all in a line. So you should say answer??? Children are not defined by school The Fonz You cannot teach a man anything; you can only help him find it within himself Galileo Galilei Sometimes I deliberately make mistakes, just to test you!

In mathematics, you don't understand things. You just get used to them. If it ain't broke, fix it until it is. Always satisfy the Prime Directive of getting the right answer above all else.

Thanks guys. Which of the following most completely describes the new elements have we created? Imagine you printed out the picture below, enlarged it with a photocopier, and then compared the two figures. Everything would look larger, but many of these things would not actually be larger because they are really infinite. B seems best out of the choices Not sure as the wording is vague.

I would say D, as I'm assuming that "extend into a line" means adding the extra bits of line with arrows. I think of a ray as "half a line". So I would extend the ray the other way to make it into a full line.

This would be answer??? I think A is correct! E looks like the correct answer to me. A ray has a starting point and at least one more point to define the direction of the ray. But for 14, 15 am still stuck I don't get it this lesson can get confusing. It is after midnight here in the UK so I'm going to have to stop after this post and look again in the morning. I think 17B is correct. I can only think that I am getting tied up in the wrong definition for a ray, a line and a plane.

The problem is I have done geometry for many years and never needed to use the term ray, so it is confusing me too. Line Segment:The set of all points that lie between two selected points. Or, the shortest distance between two points. Line: The entire set of points that lie in a location in one direction or in the opposite direction, at any distance, from a particular point. Every line contains a line segment, and every line segment can be extended into a line.

Ray A ray is the set of points lying in a single direction from an endpoint. To define a ray, you need one endpoint, and then a second point somewhere along the ray not the same as the endpoint to define the direction.

In case she wants to work on it a little more without seeing mine. Also, in case someone else pops in and would like to answer the questions. On some other forums they insist you hide your answer to any post. That allows other people to post their answers.

I know we do not have that many people answering questions but Now am stuck on 17 B was incorrect when I submitted it to my teacher I still don't get why? A Only if you have an additional point not on the angle BYes, because any two rays can define a plane CNo, because there aren't enough points DYes, because angles are big E No because rays cannot be extended into lines F Yes, because that means you have two lines that meet at a single point.

So doesn't that make F because an angle has unites two rays in a single end point so then we have two lines that meet at a single point and two lines which intersect in a single point or are parallel are defined as a plane. An angle is two rays with a common endpoint. Try F then as long as the rays are two different ones with a common endpoint.

Rays have an end point they cant extend to lines. Atom topic feed. Math Is Fun Forum Discussion about math, puzzles, games and fun. You are not logged in. Topics: Active Unanswered. Index » Help Me! Re: Naming Geometry Elements Ok sounds good. Re: Naming Geometry Elements 1- C 1. If I have a line, do I have a plane? If I have three points, do I always have a plane?

Re: Naming Geometry Elements Hi;. Re: Naming Geometry Elements Thanks guys. These are the last 4 questions in this lesson they all talk about the same image below 7- B 7. Re: Naming Geometry Elements 7- B 7.

Re: Naming Geometry Elements hi bobbym, Who are you hiding your answers from? Re: Naming Geometry Elements 8- B 14 confused because a line segment needs two points and it cant be larger then these point but a line goes on and on and they uses arrows to say they go on am thinking F. Re: Naming Geometry Elements am still really confused on 14, 15, 17 B is incorrect I posted that But for 14, 15 am still stuck I don't get it this lesson can get confusing. Re: Naming Geometry Elements A line goes on and on but the ray has a end point.

Re: Naming Geometry Elements so 15 A? Re: Naming Geometry Elements It is after midnight here in the UK so I'm going to have to stop after this post and look again in the morning.

Have you been given definitions for these terms? If so, post them please. Now for Q7. I have made the diagram below with M marked. Re: Naming Geometry Elements Good night and thank you for alll the help The definitions they gave me are these Line Segment:The set of all points that lie between two selected points. If I have an angle, do I have a plane? Re: Naming Geometry Elements But in the lesson it mentioned that A plane is defined by any of the following: three points not lying on a line a line and a point not lying on the line two lines which intersect in a single point or are parallel So doesn't that make F because an angle has unites two rays in a single end point so then we have two lines that meet at a single point and two lines which intersect in a single point or are parallel are defined as a plane.

## 3 thoughts on “How many points are needed to define a ray”

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