Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**jenny.marie.grace1****Guest**

Hi, I am just starting out in my geometry class and am quite confused. When I turned in my lesson I was surprised with the amount I had actually gotten correct. I answered 15 questions successfully but I missed 5 questions. I missed the following;

8. Imagine you printed out figure 1, 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. Knowing this, tell me how would ls_BC change? How would ln_DF change? How would ry_EG change?

AThe measure of ls_BC would be greater; the measure of ln_DF would not change; the measure of ry_EG would not change.

BThe measure of ls_BC, ln_DF, and ry_EG would not change.

CThe measure of ln_DF and ry_EG would be greater, but the rest would stay the same.

DThe measure of ls_BC and ln_DF would be greater, and the rest would stay the same.

E All of their measures would be greater.

F All of their measures would stay the same.

I answered with F

11. Does every ray contain a line segment?

AOnly if there are three points on the ray

BYes, because all you need for a line segment is one point

CNo, because an element can't be two things

DNo, because the end point is really an arrow

E Yes, because every ray needs two points to define it

F No because the points are busy making a ray

I answered with D

15. In figure 1 above, can ry_EH be used to create a line?

ANo, because rays need one endpoint

BNo, because <GEH can't have a line in it

CYes, but only if it doesn't make <GEH anymore

DNo, because there aren't enough points

E Yes, because any two points can be used to make a line

F Only if you make GE a line as well

I answered with A

16. Do two rays always define a plane?

ANo, because a ray can't be used to define a plane

BYes, because we need three points

CNo, because two rays might only make one line

DYes, because rays can be extended into lines

E No, because there aren't enough points

F Yes, because it's the number of points that matter

I answered with B

17. If I have an angle between 10 and 170 degrees, do I have a plane?

AOnly if you have an additional point not on the angle

BYes, because a ray always defines 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

I answered with E

I'm not looking for you to give me the answer but I would like some help to steer me in the right path, thank you.

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,883

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline