Drawing lines

The first instance of  is under the 4th Grade Math Mission. This exercise uses an interactive geometry sketch pad to understand lines, rays and segments.

Types of Problems
There is one type of problem in this exercise:


 * 1) Draw the situation: This problems asks the student to use the interactive pad to draw a situation involving lines, rays and segments. They are also expected to answer a question about endpoints and direction of these geometric objects.DL1.png

Strategies
This exercise is easy to get accuracy badges because the instructions are clear and the manipulative is well designed and usable. Speed badges are hard because you have to be fast with moving and clicking.


 * 1) The questions are only three types.
 * 2) A line has no endpoints because it extends infinitely far in two directions.
 * 3) A ray has one endpoint and extends infinitely far in one direction.
 * 4) A segment has two endpoints and so it has a finite length and extends infinitely far in no directions.