Scale
Drawings
The lengths and widths of objects of a scale drawing or model are ______________ to
the lengths and widths of the actual object.
Examples:
Scale
Examples:
Scale
Factor
1. A set of landscape plans shows a
flower bed that is 6.5 inches wide.
The scale on the plans is 1 inch = 4
feet.
Examples
a. What is the width of the actual flower bed?
b. What is the scale factor?
2. The central chamber of the Lincoln memorial, which features a marble
statue of Abraham Lincoln, which features a marble statue of Abraham
Lincoln, has a height of 60 feet. Suppose a scale model of the chamber
has a height of 4 inches. What is the scale of the model?
a. Write a ratio of the height of the
b. What is the scale factor?
model to the actual height of the
statue.
3. Antonio is designing a room that is 20
feet long and 12 feet wide. Make a
scale drawing of the room. Use a
scale of 0.25 inches = 4 feet.
Step 1: Find the room‛s length on
Step 2: Find the room‛s width on
the drawing (let x = length):
the drawing (let w = width):
Step 3: Make the drawing. Assume the grid below is ¼ inch grid paper.
Scale Factor Drawing Project
The following is a list of instructions and expectations for this project:
Material: Picture (details below), ruler and/or yard stick, pencil, colored pencils/markers, white poster
board (22” x 28” or 56 cm by 71 cm) without grid marks.
Instructions:
1. Find a comic (no bigger than a 4 x 6 index card – preferably smaller) to enlarge. It should be
reasonably average difficulty drawing in color (pictures with details and words are encouraged).
2. Draw a grid on the original picture (in pencil, lightly) with either ¼” x ¼” squares or 1 cm by 1 cm
squares. Make sure that the lines are straight and the squares have right angles. If the grid does
not fit the picture exactly, place the original picture on a clean plain white piece of paper and extend
the grid beyond the original picture.
3. Number both of the axes so as to be able to locate the appropriate squares when drawing.
4. You must use at least a scale factor of 1:4, but 1:5 or larger is acceptable. Choose a scale factor
that allows your enlarged picture to fit the poster board with a small but workable border.
5. Using a poster board, draw an appropriate sized grid (1:4 or greater) lightly with a pencil. Once
again, make sure that the lines are straight and that the grid is made of squares – with right angles!!!
6. Redraw the diagram being sure to use the appropriate scale factor – See Ms. Voccio if you need
assistance.
7. Colors, sizes, thickness of lines, neatness and details will be part of the grading for the project, so
please pay attention to details. The major portion of the grade will come from the accuracy of using
the scale factor and grids.
8. The project should have a border around the drawing, the original picture attached to the bottom
left corner of the project (with a grid and within the border) and should have your name, class, and
scale factor (with units – cm or inches) in the bottom right hand corner of the drawing (in the
border). See https://sites.google.com/site/mrsmillersalgebraiprojects/home/comic-scale-
factor-projects for some examples from another school.