Question

.The diameter D of a circle is twice its radius R.Express D in terms of R.​

Answer 1

D=2r

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Suppose we have to find diameter then the formula is D=2r

And

If we have to find radius the the formula is r=d/2

⏺️In question if we have to find diameter and the radius is given 6 cm then ⤵️

D=2r

D=2x6

D=12

Hence diameter is 12

⏺️In question if we have to find radius and the diameter is given 6 cm then⤵️

R=d/2

R=6/2

R=3

So the radius is double of diameter and the diameter is half of radius.