Question

If the Perimeter of a semi-circular protactor is 36cm, then it's diameter is?
a) 12cm b) 13cm c) 14cm d) 15cm​

Answer 1

Answer:

option c

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Answer 2

Answer:

14cm

Step-by-step explanation:

When the diameter is 14cm,

Length of the semi circular arc=0.5× 22÷7 ×14 = 22cm

Length of the straight line        =14cm

Perimeter of the protractor        =22cm+14cm= 36cm

∴ the diameter should be 14cm.