Perimeter of a semi circle is the sum of half of perimeter of the full circle and [[1]].

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answer is DIAMETER.

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Detailed Solution

Perimeter of a semi circle is the sum of half of perimeter of the full circle and diameter.
The sum which represents

12

part of the circumference of a circle and the diameter is called as perimeter of a semicircle.
The formula which represents the perimeter by adding half of circumference

2 πr

and d which is diameter.

\Rightarrow

π r + d

The perimeter of a semicircle is represented by

p r + d

units.
Hence, perimeter of a semi circle is the sum of half of perimeter of the full circle and diameter.
Therefore, the correct answer is diameter.

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