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#51 2012-09-01 17:47:46
- bob bundy
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Re: Naming Geometry Elements
Good morning zee-f and bobbym,
I think 16C too.
I'm going to have a long think about 17.
Back after that. 
LATER EDIT:
From Mathswords.com: angle = Two rays sharing a common endpoint.
I have an angle
=> I have two rays sharing a common endpoint
=> I have a common point + another point on ray 1 + another point on ray 2
=> I have three points
=> I have a plane
=> Answer B is correct
Bob
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
#52 2012-09-01 23:23:41
- zee-f
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Re: Naming Geometry Elements
I posted this to my teacher:
15- I choose A-No, because rays need one endpoint
15- Explanation:
Well as mentioned in the lesson because a ray continues indefinitely in one direction, but has a definite endpoint in the other direction, but a line needs two points to define it but it goes beyond these points it doesn't have a starting or ending point it keeps going forever.
she said #15 is incorrect. If a ray exists, then it contains the two points that are needed to define and name it. How many points are needed to define and name a line?
am going to submit this as a new answer:
#15- Two points are needed to define and name a line. So the right answer is (E)
15. In figure 1 above, can ry_EH be used to create a line?
E- Yes, because any two points can be used to make a line
But for #17- B, and E were in correct answers. 
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
#53 2012-09-01 23:35:56
- zee-f
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Re: Naming Geometry Elements
17. If I have an angle, do I have a plane?
17. I choose (F)Yes, because that means you have two lines that meet at a single point.
Explanation:
I have a common point another point on ray 1 + another point on ray 2 now I have three points and rays can be used to create a line. To have a plane two lines have to intersect in a single point, and an angle intersects in a single point.So,
I have a plane.
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
#55 2012-09-02 02:10:23
- bob bundy
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Re: Naming Geometry Elements
hi zee-f,
Thanks for telling us the answers your teacher was expecting. I seem to remember, way back, that I thought 15 E was a posible answer.
How are you expecting to be assessed for this work ? Will you have to do an exam ?
Bob
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
#56 2012-09-02 03:10:07
- bobbym
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Re: Naming Geometry Elements
Hi all;
Thanks for the answers.
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.
#57 2012-09-02 03:56:22
- zee-f
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Re: Naming Geometry Elements
Your welcome Bobbym...
Bob Bundy your welcome, and
Each course has many lessons around 20-30 and the lesson is explained then on the bottom there are questions to answer.
I feel like am student and a teacher at the same. No tests only questions and a grade for each lesson. When I finish all the lessons I submit a Credit Report Form (CRF) to get a grade for the whole course.
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3