1

Name: _____________________________________ Period: _______

Original Shape- Colored

1) Using the 12-cm by 14-cm graph paper below, create a design or picture.

2) Your picture MUST include at least one of the following shapes:

Rectangle

Parallelogram or Rhombus

Trapezoid

Triangle

Square

3) Color your design with colored pencils.

4) Outline all of the shapes in a BLACK SHARPIE.

Key Concepts: 1. How much will the plastic shrink when it is

heated? 2. Will it shrink the same amount in ALL directions?

14 cm

12 cm

2

.

3

DRAWING Dimensions vs. ACTUAL Shrinky Dink Dimensions Remember the shapes you choose.

Write dimensions (round to tenth’s place) for 1 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 (cm²)

DRAWING Base & Height

Actual SHRINKY DINK

(Base & Height) DRAWING Area

Actual SHRINKY DINK Area

Rectangle

b = h =

Rectangle

b = h =

Rectangle

Rectangle

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

Square

s =

Square

s =

Square

Square

4

Shrinky Dink

Place a checkmark next to each number as you complete the task.

____ 1. Cut out your DRAWING- Colored from page 1 without the dimensions.

Put your name & period on the back.

____ 2. Using sandpaper, sand your 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 quilt design and using a pencil,

trace your design onto the sanded side of the plastic.

____ 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, no light shines through the color.

____ 5. Trace the outsides of your shapes with a BLACK SHARPIE.

____ 6. DO NOT PUT YOUR NAME ON THE SHRINKY DINK.

____ 7. Have your teacher punch a hole in your plastic Shrinky Dink.

____ 8. Place both your Shrinky Dink into the plastic bag for your period.

5

DRAWING vs. ACTUAL Shrinky Dink

DRAWING ACTUAL Shrinky Dink

1) Glue Stick your DRAWING to the left of this page below.

2) Trace your ACTUAL Shrinky Dink on the right side of this page.

3) Using a cm ruler, measure the dimensions of the same shapes from your DRAWING for your

Shrinky Dink.

4) Fill out the chart on page 3 for the ACTUAL Shrinky Dink shape dimensions & areas.

5) Make a note of the shapes you used on page 3 in your drawing.

6) Fill out the tables on pages 6 & 7.

6

Calculating Scale Factor

A) Height- MODEL vs. ACTUAL Shrinky Dink

Shape Description

Scale Factor Height

DRAWING Height (cm)

MODEL Shrinky Dink Height (cm)

ACTUAL Shrinky Dink Height (cm)

From page 3

Rectangle A)

Parallelogram/ Rhombus

A)

Triangle A)

Trapezoid A)

Square A)

1) The MODEL Shrinky Dink is your mathematical prediction of what your ACTUAL Shrinky Dink

should measure. How do the MODEL Shrinky Dink height results & the ACTUAL Shrinky Dink height results compare? 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)

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

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B) Base- MODEL vs. ACTUAL Shrinky Dink

Shape Description

Scale Factor Base

DRAWING Base (cm)

MODEL Shrinky Dink Base (cm)

ACTUAL Shrinky Dink Base (cm)

From page 3

Rectangle B)

Parallelogram/ Rhombus

B)

Triangle B)

Trapezoid (Add bases together)

B)

Square B)

1) The MODEL Shrinky Dink is your mathematical prediction of what your ACTUAL Shrinky Dink

should measure. How do the MODEL Shrinky Dink base results & the ACTUAL Shrinky Dink base results compare? 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)

MODEL Shrinky Dink Area (cm²)

ACTUAL Shrinky Dink Area (cm²)

From page 3

Rectangle/ Square

C)

Parallelogram/ Rhombus

C)

Triangle C)

Trapezoid C)

Circle C)

8

1) The MODEL Shrinky Dink is your mathematical prediction of what your ACTUAL Shrinky Dink should measure. How do the MODEL Shrinky Dink area results & the ACTUAL Shrinky Dink area results compare? Did your calculations for the MODEL Shrinky Dink area match the ACTUAL Shrinky Dink area? Explain.

Percent Decrease of DRAWING to MODEL Shrinky Dink

SHAPE DRAWING

(cm) Page 3

DRAWING (mm)

cm x 10

MODEL Shrinky

Dink (cm) Page 7

MODEL Shrinky

Dink (mm)

cm x 10

Ratio: MODEL

DRAWING (mm)

Decimal (round to

tenth’s place)

Percent Decrease

(multiply decimal x

100)

Rectangle Area (Red)

Parallelogram/ Rhombus

Area

(Blue)

Triangle Area

(Green)

Trapezoid Area

(Purple)

Square Area

(Orange)

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Directions: Graph your results in (mm) from the chart on page 8 on the scatterplot below using (x, y) as the coordinate points. Use the colors from the chart to plot each point.

The DRAWING (mm) is the x-coordinate.

The MODEL Shrinky Dink (mm) is the y-coordinate.

1

1

1

1

1

1

1

1

1

2

10

.

11

Using the scale factor draw a copy.

13

12

13

14

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