1. Today, we will describe1 plane objects.
Learning Objective
Name ______________________
Today, we will describe1 plane objects.
1 tell what something looks like
CFU
What are we going to do today?
What does describe mean? Describe means ___________________________________.
Activate (or provide) Prior Knowledge 1. 2. 3.
Triangle
Circle
Square
CFU
Teacher, remind students the names of each shape. Students, tell your partner the name of each shape.
What is the first shape? What is the second shape? What is the third shape?
Students, we already know how to name different shapes. We also know that each shape is different. Today, we will look at those differences by describing plane objects.

2. 3 4 A plane object is a flat shape.
Concept Development
A plane object is a flat shape.
Plane objects can have sides and corners.
Sides
straight lines
Corners sides meet
Sides are straight lines.
Corners are where two sides meet.
Examples:
Object Name
Shape
Sides
Corners
Triangle 3
Circle
Square 4
Rectangle
CFU
Which shape below does not have any sides? How do you know?
A B.
In your own words, what is a plane object? A plane object is ______________________________.
What two things can a plane object have? A plane object can have _________ and __________.

3. 3 3 4 4 4 4 No straight lines No sides meet Plane object Sides Corners
Skill Development/Guided Practice
A plane object is a flat shape.
Plane objects can have sides and corners.
Sides
straight lines
Corners sides meet
Describe plane objects.
Step #1: Look at the plane object.
Step #2: Count and write the number of sides.
Step #3: Count and write the number of corners.
Plane object
Sides
Corners 3 3
CFU
How did I find the sides? Why did I look for straight lines? How did I find the corners? How did you find the sides? Why did you look for straight lines? How did you find the corners?
No straight lines
No sides meet 4 4 4 4

4. Is Lori describing a cat or a snake?
Relevance
A plane object is a flat shape.
1. Describing plane objects will help you describe other kinds of shapes and objects you see.
Lori described her pet’s face as being a big circle with two triangles on top.
Is Lori describing a cat or a snake?
CFU
Does anyone else have another reason why it is relevant to describe plane objects? (pair-share) Why is describing plane objects relevant to you?

5. 3 3 Plane object Sides Corners A plane object is a flat shape.
Plane objects can have sides and corners.
Sides
straight lines
Corners sides meet
Step #1: Look at the plane object.
Step #2: Count and write the number of sides.
Step #3: Count and write the number of corners.
Plane object
Sides
Corners 3 3
Constructed Response Closure
Carly is putting money into a machine. The machine only takes money that
has corners. Which is Carly putting into the machine? How do you know?
Summary Closure
What did you learn today about describing plane objects? (pair-share)

6. 3 3 4 4 4 4 Plane object Sides Corners A plane object is a flat shape.
Independent Practice
Name __________________________
A plane object is a flat shape.
Plane objects can have sides and corners.
Sides
straight lines
Corners sides meet
Describe plane objects.
Step #1: Look at the plane object.
Step #2: Count and write the number of sides.
Step #3: Count and write the number of corners.
Plane object
Sides
Corners 3 3 4 4 4 4

7. 4 4 4 4 3 3 Plane object Sides Corners A plane object is a flat shape.
Periodic Review 1
Name __________________________
A plane object is a flat shape.
Plane objects can have sides and corners.
Sides
straight lines
Corners sides meet
Describe plane objects.
Step #1: Look at the plane object.
Step #2: Count and write the number of sides.
Step #3: Count and write the number of corners.
Plane object
Sides
Corners 4 4 4 4 3 3

8. 4 4 3 3 4 4 Plane object Sides Corners A plane object is a flat shape.
Periodic Review 2
Name __________________________
A plane object is a flat shape.
Plane objects can have sides and corners.
Sides
straight lines
Corners sides meet
Describe plane objects.
Step #1: Look at the plane object.
Step #2: Count and write the number of sides.
Step #3: Count and write the number of corners.
Plane object
Sides
Corners 4 4 3 3 4 4

9. 4 4 4 4 3 3 Plane object Sides Corners A plane object is a flat shape.
Periodic Review 3
Name __________________________
A plane object is a flat shape.
Plane objects can have sides and corners.
Sides
straight lines
Corners sides meet
Describe plane objects.
Step #1: Look at the plane object.
Step #2: Count and write the number of sides.
Step #3: Count and write the number of corners.
Plane object
Sides
Corners 4 4 4 4 3 3

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