February 12, 2015
Bell Ringer
*Each person needs a ruler from the front*
Carlos made a scale model of a local bridge.
The model spans 6 inches the actual bridge
spans 50 feet. What is the scale of the model?
On a map it is 4 inches between city A and city
B. The scale of the map is .5 inches=50 miles.
What is the actual distance between the two
cities?
7.7 homework
Pg 520-523 (6-46, every 4th, not 22)
February 12, 2015
February 12, 2015
Objectives
-Interpret scale models.
-Use scale factors to solve problems.
February 12, 2015
Model
Actual
Using maps as scale drawings
Turn to page 518 in your book
Find the actual distance from
Chattanooga to Savannah.
Find the actual distance from Nashville to Murfreesboro.
Turn to page 521
February 12, 2015
Find the Scale of the Model.
A doll house that is 15 inches tall is a scale model of a real house
with a height of 20 feet.
What is the scale of the model?
How many times as tall as the real house is the model?
The length of a model train is 18 inches. It is a scale model of a
train that is 48 feet long.
What is the scale of the model?
George is making a 139 cm long scale of the Parthenon for his
World History class. The actual Parthenon is 69.5 meters long.
What is the scale of the model?
February 12, 2015
Using a scale factor
The Eiffel Tower in Paris, France is 986 feet tall. A replica of the
Eiffel Tower was built as a ride in an amusement park. If the scale
factor of the replica to the actual tower is approximately 1:3, how
tall is the ride?
Peter bought a 1 in :12 ft scale model of a rocket. If the height of
the model is 7 inches, what is the approximate height of the
rocket?
February 12, 2015