The perimeter of a semi circular protractor is 32.4 cm. Calculate :
(i) the radius of protractor in cm, (ii) the area of protractor in `cm^(2)`

Explanation

To solve the problem step by step, we will follow the instructions given in the video transcript.

### Step 1: Understand the perimeter of the semicircular protractor
The perimeter (P) of a semicircular protractor consists of the straight edge (which is the diameter) and the curved edge (which is the semicircular arc). The formula for the perimeter of a semicircle is given by:
\[ P = \text{Diameter} + \text{Arc Length} \]
The arc length for a semicircle can be calculated as:
\[ \text{Arc Length} = \pi r \]
where \( r \) is the radius of the semicircle. The diameter is:
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