\"\"

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Diameter (d) of the circle is given by 26.8 cm.

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\"\"

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\"\"                                    (Substitute \"\")

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\"\"                                       (Divide)\"\"

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Find circumference (C) of the circle.

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\"\"                                              (Apply circumference formula)

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\"\"                                    (Substitute \"\")

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\"\"                                        (Multiply)

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\"\"                                          (Substitute \"\")

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\"\"                                      (Multiply)\"\"

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The value of the radius \"\" and circumference \"\".