6.2 – Use Proportions to Solve Geometry Problems

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Presentation transcript:

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?