Khan Academy

Supporting grades: 7

Description: Sal finds a missing side length in a scale drawing when given either a set of corresponding side lengths or one side length and the scale factor. We're told a scale on a blue print drawing of a house shows 10 centimeters represents 2 meters. What number of actual meters are represented by 18 centimeters on the blue print? And so what we can do is set-up a little bit of a table here, so let's put the drawing on the left, so this is the blue print drawing.

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