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Stacking circles
Circles are stacked. How high is the top point above the ground?
Publisher: Texas Instruments UK
Editor: Barrie Galpin
Author: David J C Elgin
Topic: Mathematics
Tags Pythagoras
Students are required to use Pythagoras and simple geometry to calculate the height of the point A above the ground.
Clicking on the slider in the bottom right corner reveals the correct answer. New examples can be made by moving the white circle on each diagram]