#### Transcript Eddie the Elf and the Gingerbread House

```Eddie the Elf
and the
Gingerbread
House
By: Rebecca Isbell
Way up North,
where the air is quite cold,
There is a secret place,
Where magic unfolds.
There are lots and lots of little elves,
And toys lined up on endless shelves.
There are pine trees, candy canes, and long,
long lists,
Carols being sung, and the wrapping of gifts.
There are reindeer who fly,
and a big man in red.
But my favorite thing of all is the…
GINGERBREAD!
Welcome to the North Pole.
Please come with me…
The gingerbread competition
is a great sight to see!
There are houses with windows
and houses with doors.
There are houses with ceilings
and houses with floors.
But there is one little house,
please don’t make fun,
One little house without a roof that is done.
My gingerbread house
needs a roof and fast!
Let’s try to build one
that’s strong and will last!
I have three different roofs
that I have prepared.
Let’s try them all on
and see how they fare.
This roof has an angle
that’s small
Which makes the roof rather
too tall!
This angle is less than
ninety degrees.
It doesn’t seem to suit
What kind of angle is this?
Why, it must be an……
ACUTE!
Acute Angles
An acute angle is an angle measuring between 0 and 90 degrees.
Example:
The following angles are all acute angles.
Let’s go on to the
second one
A shorter roof might get
it done.
This roof is too low and
short.
It is of no great use.
The angle is greater
than ninety degrees.
This angle is called
an….
OBTUSE!
Obtuse Angles
An obtuse angle is an angle measuring between 90 and 180 degrees.
Example:
The following angles are all obtuse.
I have searched all day
And searched all night
I need to make the roof just RIGHT!
Perhaps that’s it,
and we will see!
Let’s try on our roof
Not one, two, but THREE!
It fits! It fits!
The angle is RIGHT.
How many degrees
are in this perfect sight?
That’s right, that’s right.
It is NINETY degrees.
My house is finished,
And I am so pleased!
Thank you, oh thank you
For all your great help!
I’ll be sure to tell my boss
How you saved Eddie the Elf!
The End.
TEKS
§111.16. Mathematics, Grade 4.
(a) Introduction.
(2) Students select and use formal language to describe their reasoning as they identify, compare, and
classify two- or three-dimensional geometric figures; and they use numbers, standard units, and
measurement tools to describe and compare objects, make estimates, and solve application problems.
Students organize data, choose an appropriate method to display the data, and interpret the data to
make decisions and predictions and solve problems.
(b) Knowledge and skills.
(4.8) Geometry and spatial reasoning. The student identifies and describes attributes of geometric
figures using formal geometric language.
The student is expected to:
(A) Identify and describe right, acute, and obtuse angles
(C) Use essential attributes to define two- and three-dimensional
geometric figures.
```