Answer: D=13, R=6.5
Explanation:
The diameter is the length of the whole circle. The radius is the length of 1/2 the circle.
That said,
the diameter is alreaday given because that line goes across the whole circle.
D= 13
R= 6.5
Now the radius is 1/2 the diameter. 1/2 of 13= 1/2x13= 6.5
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