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Work out the perimeter of the semicircle take pie to be 3.142 and write down all the digits given by the calculator

Work out the perimeter of the semicircle take pie to be 3.142 and write down all the-example-1

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The perimeter of the semicircle can be found by adding the length of the straight edge to half the circumference of the circle:

Length of straight edge = diameter = 2 × radius = 2 × 11 cm = 22 cm
Circumference of the semicircle = 1/2 × 2πr = πr = π(11 cm) = 34.562 cm (using π = 3.142)

Therefore, the perimeter of the semicircle is 22 cm + 34.562 cm = 56.562 cm.

The calculator will display all the digits in its internal representation of the answer, but the number of digits displayed may depend on the calculator used.
User Rian Sanderson
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