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1
Name: _____________________________________ Period: _______
This assignment is a test grade & is due on ________________________.
You may use a calculator.
Original DRAWING- Colored
1) Using the 14-cm by 12-cm graph paper below, create a design or picture.
2) Your picture MUST include at least one of EACH of the following shapes:
Rectangle or Square
Parallelogram or Rhombus
Trapezoid
Triangle- any type
Circle
3) Color your design with colored pencils.
4) Outline all of the shapes in a BLACK SHARPIE.
5) Cut out drawing.
Key Concepts:
1. How much will the plastic shrink when it is heated?
2. Will it shrink the same amount in ALL directions?
2
.
3
DRAWING Dimensions vs. ACTUAL Shrinky Dink Dimensions Remember the shapes you choose.
Write dimensions (round to tenth’s place) for
ONE of each shape type in your drawing.
Remember for height, measure the altitude
from a vertex down to the base.
Write out Area Formula & Calculate Area of
DRAWING & ACTUAL Shrinky Dink.
LABEL (cm²)
Round to tenth’s place.
DRAWING
Base & Height
Actual SHRINKY
DINK
(Base & Height)
DRAWING Formula
& Area
Actual SHRINKY
DINK
Area Rectangle/ Square
b =
h =
Rectangle/ Square
b =
h =
Rectangle/ Square
Rectangle/ Square
Parallelogram/Rhombus
b =
h =
Parallelogram/Rhombus
b =
h =
Parallelogram/Rhombus
Parallelogram/Rhombus
Trapezoid
𝒃𝟏 + 𝒃𝟐 =
h =
Trapezoid
𝒃𝟏 + 𝒃𝟐 =
h =
Trapezoid
Trapezoid
Triangle
b =
h =
Triangle
b =
h =
Triangle
Triangle
Circle
r =
d =
Circle
r =
d =
Circle- Use 3.14 for π
Circle- Use 3.14 for π
4
Creating Your Shrinky Dink Directions: Place a checkmark next to each number as you complete the task.
____ 1. Cut out your DRAWING- Colored from page 1 without the dimensions.
____ 2. Using sandpaper, sand the plastic so that when you hold it up to the light,
you cannot see any smooth plastic, or light coming through.
____ 3. Place the plastic over your colored original design and using a pencil,
trace your design onto the sanded side of the plastic. Use a ruler to make
straight lines.
____ 4. Using ONLY colored pencils, color in your design EXACTLY like your
DRAWING.
Color in your shapes as dark as possible.
When you hold it up to the light, you can’t see any white spaces.
____ 5. Trace the outsides of your shapes with a BLACK SHARPIE.
Use a ruler for straight lines.
____ 6. DO NOT PUT YOUR NAME ON THE SHRINKY DINK.
____ 7. Punch a hole in your plastic Shrinky Dink if you wish.
____ 8. Bring Shrinky Dink to oven to be melted.
5
DRAWING vs. ACTUAL Shrinky Dink
DRAWING ACTUAL Shrinky Dink
1) Glue Stick your DRAWING to the left of this page below, under DRAWING.
2) Trace the perimeter of the ACTUAL Shrinky Dink on the right side of this page, under ACTUAL
SHRINKY DINK.
3) Measure (cm) the base & height of your DRAWING & Shrinky Dink & write in the dimensions.
Round to the nearest tenth.
4) Measure (cm) the dimensions of the 5 shapes you chose & write the dimensions onto your
DRAWING.
5) Fill out the chart on page 3 for the ACTUAL Shrinky Dink shape dimensions & areas.
6
Calculating Scale Factor
A) Height- MODEL vs. ACTUAL Shrinky Dink
Shape
Description
Scale Factor
Height
DRAWING
Height (cm) (Page 3)
MODEL Shrinky
Dink Height (cm) Mathematical Height
ACTUAL Shrinky
Dink Height (cm) (From Page 3)
Rectangle/
Square A)
Parallelogram/
Rhombus A)
Triangle A)
Trapezoid A)
Circle- Diameter A)
1) The MODEL Shrinky Dink is your mathematical prediction of what your ACTUAL Shrinky
Dink should measure. Compare the MODEL Shrinky Dink height results & the ACTUAL
Shrinky Dink height results in the table above.
Did your calculations for the MODEL Shrinky Dink height match the ACTUAL
Shrinky Dink height? Explain.
Column 1 Column 2 Column 3 Column 4
Outside of
Shapes
DRAWING (x)
(cm)
ACTUAL (y)
Shrinky Dink
(cm)
Ratio (cm)
𝑦
𝑥=
DRAWING
kShrinkyDin
Scale Factor
𝒌 =𝒚
𝒙
(Decimal) Round to tenth’s place
Outside Height
(cm) A)
Outside Base
(cm) B)
Area
(𝐜𝐦𝟐) C)
Height
Base
Area
7
B) Base- MODEL vs. ACTUAL Shrinky Dink
Shape Description Scale Factor
Base
DRAWING
Base (cm) (Page 3)
MODEL Shrinky
Dink Base (cm) Mathematical Base
ACTUAL Shrinky
Dink Base (cm) (From Page 3)
Rectangle/ Square B)
Parallelogram/
Rhombus B)
Triangle B)
Trapezoid (Add bases together)
B)
2) Compare the MODEL Shrinky Dink base results & the ACTUAL Shrinky Dink base results
in the table above.
Did your calculations for the MODEL Shrinky Dink base match the ACTUAL Shrinky
Dink base? Explain.
C) Area- MODEL vs. ACTUAL Shrinky Dink
Shape
Description
Scale Factor
Area
DRAWING
Area (cm²) (Page 3)
MODEL Shrinky
Dink Area (cm²) Mathematical Area
ACTUAL Shrinky
Dink Area (cm²) (From Page 3)
Rectangle/
Square C)
Parallelogram/
Rhombus C)
Triangle C)
Trapezoid C)
Circle C)
3) Compare the MODEL Shrinky Dink area results & the ACTUAL Shrinky Dink area results in
the table above.
Did your calculations for the MODEL Shrinky Dink area match the ACTUAL Shrinky
Dink area? Explain.
8
SHAPE
DRAWING
Area
(mm) cm x 10
MODEL
Shrinky
Dink Area
(mm)
cm x 10
DIFFERENCE
between
DRAWING &
MODEL
areas (mm)
Ratio:
DIFFERENCE
DRAWING
(mm)
Decimal (round to
tenth’s
place)
Percent
Decrease (decimal x
100)
Rectangle/
Square Area
(Red)
Parallelogram/
Rhombus
Area
(Blue)
Triangle
Area
(Green)
Trapezoid
Area
(Purple)
Circle
Area
(Orange)
Directions for the Scatterplot Graph on the next page: (turn page 9 long ways)
Create a scale on both the x & y axis according to your data above, using the results in
(mm). Graph your results in onto the scatterplot using (x, y) as the coordinate points. Use
the colors from the chart to plot each point to represent each shape. DO NOT connect
the points.
The DRAWING (mm) is the x-coordinate.
The MODEL Shrinky Dink (mm) is the y-coordinate.
Convert the DRAWING area & MODEL area
to from cm to mm by multiplying the areas
by 10.
9
Drawing (mm)
MO
DE
L S
hri
nky
Din
k (
mm
)
10
.
13
Use the scale factor to draw a copy from the original. You do not need to draw the image inside, just the
outside.
Measure each set of picture frames to the nearest 0.1 cm to determine
the scale factor. Write in the measure of each base & height on both
the original and copy.
11
12
13
14
50% R
educ
tion
Dra
w a
50
% r
educ
tion
of
the o
rigi
nal.
Bot
h t
he
wid
th a
nd leng
th w
ill be h
alf
of t
he o
rigi
nal.
The
thic
kne
ss o
f al
l pa
rts
will be h
alf
of t
he o
rigi
nal.
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50% Reduction