Answer :

[tex]D=17cm \\ D=2 R \\\\ 17cm=2R \\\\ R=\frac{17cm}{2} \\\\ \boxed{R= 8,5 cm }[/tex]
Look at the picture.

diameter = 2 x radius

therefore:

r = 17cm : 2 = 8.5 cm
View image Аноним

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