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There are three worksheets in which pupils are challenged to find the areas of the shaded parts. The challenging bit is to justify why, in one the figures, the diameter of the square and that of the circle. The answer lies in the application of the angle in a semicircle.

Knowledge required:

  1. How to find area of a triangle
  2. How to find area of a circle
  3. Use of Pythagoras theorem

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