Download Module 8 Lesson 1 and 2

Module 8
Lesson 1 & 2
Objectives
Describe two-dimensional shapes based on attributes.
Build, identify, and analyze two-dimensional shapes
with specified attributes.
Sprint: Adding Across a Ten
Sprint A:
On your mark, get set, THINK!
Sprint B:
On your mark, get set, THINK!
Rename the Larger Unit
I’m going to give you a
number of ones. I want you
to make as many tens as you
can, and then tell me how
many tens and ones. If there
are no ones, then just say the
tens. Ready?
10 ones = ____ ten.
Say the number sentence.
100 ones = ____ tens 10
ones.
Say the number sentence.
120 ones = ____ tens 10
ones.
140 ones
210 ones
250 ones
225 ones
381 ones
360 ones
306 ones
Application Problem
Terrence is making shapes with 12 toothpicks. Using
all of the toothpicks, create 3 different shapes he could
make. How many other combinations can you find?
Concept Development
Let’s look at this shape.
How would you describe this shape without using it’s
name?
Good. If a figure has three corners, then it also has three
angles. An angle is the figure formed where two sides meet.
Watch as I mark the angles on the triangle.
Although these shapes look different, all of them have some
attributes, or characteristics, in common. What are they?
All of these shapes have common attributes. They all have
three straight sides and three angles.
Concept Development
Now, let’s look at another shape.
How would you describe this shape without using its
name?
Yes! Is there an angle here? It looks different.
Let’s count the angels. I’m going to put my finger next to
the first angle we count, and continue counting as we go
around the shape. That way, we won’t count the same
angle twice.
Although these shapes look different, all of them have
what attributes?
All of these shapes have common attributes. They all have
4 straight sides and 4 angles.
Concept Development
Now, let’s look at another shape.
How would you describe this shape without
using its name?
Let’s count the angels.
Although these shapes look different, all of
them have what attributes?
All of these shapes have common attributes.
They all have 5 straight sides and 5 angles.
Concept Development
Now, let’s look at another shape.
How would you describe this shape without
using its name?
Let’s count the angels.
Although these shapes look different, all of
them have what attributes?
All of these shapes have common attributes.
They all have 6 straight sides and 6 angles.
Concept Development
There are many shapes that have more than six sides or six
angles.
Now, it’s your turn to try and stump your partner. Build a
shape with any number of sides or angles. Then, trade with
your partner. See if you can count the number of sides and
angles on your partner’s shape. If you agree, then make
another shape.
Tell your partner why you need to pay attention to more
than how a shape looks when grouping shapes.
Now that we have done so much work with different shapes,
how would you describe an angle? Talk to your partner.
The angle is the figure formed where two sides meet.
Application Problem
How many triangles can you find?
Hint: If you only found 10, keep looking!
Angle:
Vocabulary
the figure formed where two sides meet.
Attributes:
Characteristics of an object such as number of sides, angles, or faces.
Polygon:
A closed figure with three or more straight sides. Every side meets exactly
two other sides at the corners. A polygon always has the same number of
angles as sides.
Triangle:
A three-sided polygon with three angles.
Quadrilateral:
A four-sided polygon with four angles.
Pentagon:
A five-sided polygon with five angles.
Hexagon:
A six-sided polygon with six angles.
Complete That Shape
Now, we’re going to play Complete That Shape.
I am going to draw part of a shape on the
board, like this. Then, I will say, “Complete that
pentagon.” With your toothpicks, start with the
part I have drawn, and add more sides, corners,
and angles until you have built the entire shape.
Let’s play.
Complete that pentagon!
Watch
How many sides and angles do you have?
Complete that quadrilateral!
How many sides and angles do you have?
Complete That Shape
Complete that triangle!
How many sides and angles do you have?
Complete that hexagon!
How many sides and angles do you have?
Complete that quadrilateral!
How many sides and angles do you have?
Complete that triangle!
How many sides and angles do you have?
Complete that pentagon!
How many sides and angles do you have?
Let’s Check for Understanding
Could a polygon have only two angles? Why or why not?
Polygons have many angles. Poly- means many, and -gon means
angle. What is the smallest number of angles a polygon can have?
If you closed your eyes and felt a shape with five sides and five
corners, could you name it?
What would you name it?
Picture a square in your head. Could you describe a square with
another name?
What would you name it?
Picture a three-sides shape in your head. Could you describe the
polygon with another name?
What would you name it?
What would you name a 6-sided shape that has 6 angles?