The pink trapezoid is dilated by a factor of 3. The resulting image is shown in blue. What is the ratio of the perimeters of the
two trapezoids? (small:large)
A) 1:2
B) 1:3
C) 1:4
D) 1:6
A) 1:2
B) 1:3
C) 1:4
D) 1:6
2 answers:
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Given :
A boat is being pulled into a dock with a rope attached to the boat at water level. When the boat is 12 feet from the dock, the length of the rope form the boat to the dock is 3 feet longer than twice the height of the dock above the water.
To Find :
The height of the dock.
Solution :
This will make a right angle triangle as given in link below .
Now , applying Pythagoras theorem :
Now , h = 5 or h = -9 .
Now , height cannot be negative .
So , height of the dock is 5 ft .
Hence , this is the required solution .