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.
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