Grade 6
Name_____Answer Key_______
Geometry & Measurement
Directions: Use the diagram below to answer the questions.
= 1 square unit
1. If the net was cut out along the solid lines and folded along the broken lines, what figure
would be created?
Draw the model and describe it in complete sentences.
Drawing
Sample Response:
The figure would have 3 faces that are rectangles
and 2 faces that are triangles. The student might
use “triangular prism” in the response
depending on prior experiences with prisms.
2. What is the surface area of the figure?
The student will most likely count the number of squares within each shape and indicate the
approximate number. The main idea is estimation in conjunction with 2-D and 3-D models.
Each triangle is about 6 square units. Each parallelogram is about 23 square units.
The total surface area would be approximately 2(5) + 3(22) or about 76 square units since the
total area would be the sum of all the individual areas.
As long as the student response is close to 70.5 square units and the work is mathematically
sound, the estimated response is okay.
Grade 6
Name_____Answer Key_______
Geometry & Measurement
Scoring Guide

Question 1


Explanation



Question 2
0
1
Student does not  Student is able to
draw a 3-d
draw a model
model.
that represents a
rectangular
Model does not
prism.
represent a
prism.
Student does not  Student gives a
attempt to
correct
explain the figure.
description of the
figure, but is nonNo or poorly
specific about the
written
characteristics of
explanation.
the shape.
Student does not  Student finds
find area.
areas for some of
the shapes.
Student’s
estimate is not
 Student’s
invalid.
estimate is
somewhat
reasonable.
2
 Student is able to
draw an accurate
model.
 Explanation is
well written
 Student explains
the figure using
the concepts of
rectangle and
triangle.
 Student finds
area for each
shape.
 Student is able to
accurately
estimate the
area.