Plainfield Board of Education
Office of Elementary Mathematics
Name: _____________________________
Date: _____________
Teacher: ____________________________
Grade 1
Unit 5 Assessment Answer Key – Defining Attributes of 2-D and 3-D
Shapes
Section 1
1. Choose the closed shape.
(1.G.1)
2. Luke pushes these two triangles together. What is the name of the
new shape that Luke makes?
(1.G.2)
a. triangle
b. rectangle
c. rhombus
d. trapezoid
Plainfield Board of Education
Office of Elementary Mathematics
3. Geneva pushes these two shapes together. What is the name of the
new shape that Geneva makes?
(1.G.2)
a. triangle
b. rectangle
c. square
d. trapezoid
4. Draw a rectangle.
(1.G.1)
Plainfield Board of Education
Office of Elementary Mathematics
5. Draw a trapezoid. How many sides does a trapezoid have?
(1.G.1)
_____4______ sides
6. Rosa sees the following shapes drawn on the board. How many
(1.G.1)
of the shapes have zero sides?
______2_____ shapes
Plainfield Board of Education
Office of Elementary Mathematics
7. Jordan made this big triangle using smaller triangles. How many
(1.G.2)
smaller triangles are missing?
______3_____ triangles
8. Make a shape on the geoboard that is made up of 2 rectangles and a
triangle.
(1.G.2)
Student’s new shape should show that they used 2 rectangles and a
triangle.
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Plainfield Board of Education
Office of Elementary Mathematics
Section 2: Open Ended Response
9. Label each shape. Tell how they are similar and how they are
different.
(1.G.1)
Triangle
Rectangle
Square
__Trapezoid________
_____Rectangle______
Trapezoid
Rhombus
They are similar because Student’s response should show their
understanding of how the 2 shapes are similar.
_________________________________________________________
They are different because Student’s response should show their
understanding of how the 2 shapes are different.
__________________________________________________________.