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The radius of this circle is r. Which rule gives its diameter?

Class 6Rules and Formulas with VariablesAlgebra

Ar + 2
B $4 r$
C $2 r$
D $\frac{r}{2}$

Step-by-Step Solution

The diameter goes right across the circle through the centre O: it is two radii long, so

d = 2 r

.

Answer: C)

2 r

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