First Name__________________ Last Name__________________
Indicator: G5 Describe points, lines, and planes and identify models in the
environment.
1. Toreona says that the top of a desk is a good model of a point, but Devon
disagrees. He says the top of a desk is a good model of a geometric plane. In the
box below, explain why Toreona is incorrect and why Devon is correct. Use words
and/or pictures to explain your answer. (4 points)
2. What is a line? Explain using words and a picture. (2 points)
3. What real-world object could be used to best model a point? (1 point)
A. bicycle wheel
B. telephone wire
C. room wall
D. tip of a pin
Scoring Criteria
Problem One
4
Explanations are correct and may or may not contain a picture:
1. Toreona is incorrect because a point is an exact location in space. The top of a desk
does not represent one exact location in space.
2. Devon is correct because a geometric plane is a figure with only two dimensions. The
top of a desk is a flat figure with only two dimensions.
Work is neat, organized, and very easy to read.
3
Explanations are correct but one may not contain sufficient detail to fully explain why Toreona is
incorrect OR why Devon is correct. One explanation, however, is very clear and complete.
Work is neat, organized, and very easy to read.
2
Explanations are correct but do not contain sufficient detail to fully explain both why Toreona is
incorrect and why Devon is correct.
Work is not always easy to read.
1
Only one explanation is correct.
0
Work is not always easy to read.
Neither explanation is correct, work is sloppy and can’t be understood, or work is incomplete.
Problem Two
2 Definition includes that a line is a straight path of points that goes on and on in two directions. A
picture is included that has arrows on the ends to indicate that the line goes on and on.
1
0
Either the written explanation or the picture is correct.
Neither the written explanation or the picture is, work is sloppy and can’t be understood, or work
is incomplete.
Problem Three
D