Transcript 6.2 – Use Proportions to Solve Geometry Problems

6.2 – Use Proportions to Solve
Geometry Problems
6.2 – Use Proportions to Solve
Geometry Problems
Example 1:
In the diagram, MN/RS = NP/ST. Write four
other true proportions.
6.2 – Use Proportions to Solve
Geometry Problems
Example 2:
In the diagram, BD/DA = BE/EC. Find BA and
BD.
6.2 – Use Proportions to Solve
Geometry Problems
A scale drawing is a drawing that is the same
shape as the object it represents.
The scale is a ratio that describes how the
dimensions in the drawing are related to the
actual dimensions of the object.
6.2 – Use Proportions to Solve
Geometry Problems
Example 3:
The blueprint shows a scale drawing of a cell
phone. The length of the antenna on the
blueprint is 5 cm. The actual length of the
antenna is 2 cm. What is the scale of the
blueprint?
6.2 – Use Proportions to Solve
Geometry Problems
Example 4:
The scale of the map at the right is 1 in:26
miles. Find the actual distance from
Pocahontas to Algona.
6.2 – Use Proportions to Solve
Geometry Problems
Example 6:
You buy a 3-D scale model of the Reunion
Tower is Dallas, TX. The actual building is 560
feet tall. Your model is 10 inches tall, and the
diameter of the dome on your scale model is
2.1 inches.
What is the diameter of the actual dome?
About how many times as tall as your model is
the actual building?