Reteach
Chapter 12
Grade 2
Name
Lesson 1
Reteach
Two-Dimensional Shapes
A two-dimensional shape is a shape having
length and width.
quadrilateral or
square
quadrilateral or
parallelogram
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quadrilateral or
rectangle
triangle
hexagon
pentagon
Draw a line from the shape to its name.
pentagon
quadrilateral
triangle
hexagon
Grade 2 • Chapter 12 Geometric Shapes and Equal Shares
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Name
Lesson 2
Reteach
Sides and Angles
Vc\aZ
h^YZ
)Vc\aZhVcY)h^YZh
Write the number of sides and angles for each shape.
Figure
Sides
Angles
1.
2.
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3.
4.
5.
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Grade 2 • Chapter 12 Geometric Shapes and Equal Shares
Name
Lesson 3
Reteach (1)
Problem Solving
STRATEGY: Draw a Diagram
Jada used a stick to draw a shape in the sand.
The shape had 5 sides and 5 angles. What
shape did Jada draw?
Step 1
Understand
What do I know?
The shape Jada drew has
5 sides and 5 angles.
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What do I need to find?
The shape Jada drew.
Step 2
Plan
How will I solve the problem?
Step 3
Solve
Draw a diagram.
I will
draw a diagram
Jada drew a
Step 4
Check
.
pentagon
.
How do I know my answer is
reasonable?
The diagram I drew is a pentagon.
5 sides and 5
It has
angles just like the shape Jada
drew.
Grade 2 • Chapter 12 Geometric Shapes and Equal Shares
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Name
Lesson 3
Reteach (2)
Problem Solving
STRATEGY: Draw a Diagram
Apply the strategy to solve.
1. Miles drew a pentagon. Nora drew a shape with
fewer sides than a pentagon and more sides than
a triangle. What did Nora draw?
Draw it.
2. Gracie gave her brother a sticker. The sticker is in
the shape of a triangle. There is a red hexagon on
the sticker. Draw what the sticker could look like.
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Grade 2 • Chapter 12 Geometric Shapes and Equal Shares
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3. Nolan’s favorite shape is a quadrilateral. He likes
all different kinds of quadrilaterals. Draw 3 different
types of quadrilaterals.
Name
Lesson 4
Reteach
Three-Dimensional Shapes
Color each figure the correct color.
1. Color the cone red.
2. Color the pyramid blue.
3. Color the sphere green.
4. Color the cube yellow.
5. Color the cylinder purple.
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6. Color the rectangular prism
orange.
7. Draw a yellow line around the cone.
Then draw a red line around the sphere.
8. Find the cubes in the picture.
Circle them.
Grade 2 • Chapter 12 Geometric Shapes and Equal Shares
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Lesson 5
Reteach
Faces, Edges, and Vertices
12 edges
6 faces
8 vertices
Write the number of faces, vertices, and edges for
each shape.
Shape
Faces
Vertices
Edges
1.
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2.
3. Find the shape that has 2
circular faces. Color it blue.
4. Find the shapes with the
same number of faces.
Color them red.
5. Circle the shape that has
5 faces, 8 edges, and
5 vertices.
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Grade 2 • Chapter 12 Geometric Shapes and Equal Shares
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Lesson 6
Reteach
Relate Shapes and Solids
If you trace the face of a cube, you will make
a square. Try it.
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1. Find a cylinder. Trace one of its faces. What
shape is it?
2. Find a cone. Trace its face. What shape is it?
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Name
Lesson 7
Reteach
Halves, Thirds, and Fourths
Partition means to separate shapes into equal
parts. These shapes are partitioned.
2 halves
3 thirds
4 fourths
Describe each partitioned shape.
1.
2.
4.
3.
thirds
112
fourths
fourths
Grade 2 • Chapter 12 Geometric Shapes and Equal Shares
Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.
halves
Name
Lesson 8
Reteach
Partitioning
Remember, partition means to separate shapes into
equal parts.
Have you ever separated a larger object into equal
smaller pieces to share?
If so, you used partitioning in your everyday life.
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Pretend this rectangle is a granola bar that you want
to share with friends. How many people could share it
if you partitioned it into the smaller squares?
3
people
Draw an object that is in the shape of the rectangle.
Then partition it into equal squares.
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