Answer:
12.74 cm
Step-by-step explanation:
semicircle: πr
πr = 40
r = 40 / 3.14 = 12.74
The radius of the semicircle is 12.73 cm if a piece of wire length of 40 cm is bent to form a semicircle.
It is given that a piece of wire 40 cm in length is bent to form a semicircle.
It is required to find the radius of the semicircle.
It is defined as the combination of points that and every point has an equal distance from a fixed point ( called the center of a circle).
The length of the wire = 40 cm
We know the perimeter of the circle = 2πr, where r is the radius of a circle.
The perimeter of the semi-circle = πr
Length of wire = πr
40 = πr or
r = 12.73 cm
Thus, the radius of the semicircle is 12.73 cm if a piece of wire length of 40 cm is bent to form a semicircle.
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