To find the perimeter of the curved section of the semi-circle:
Perimeter of semicircle = Pi x radius
If you also need to the find the perimeter of the straight part of the semicircle (the diameter), it is simply double the radius.
Chat with our AI personalities
Perimeter of the semicircle including its base: 180/360*pi*45+45 = 115.686 cm rounded to 3 decimal places
If the semicircle is placed on 1 side of the rectangle:Find the total perimeter(circumference) of the side opposite to the one with the semicircle's base and the 2 sides perpendicular to the semicircle's base.The formula for circumference of a circle is 2πr.Thus for the semicircle we will take the circumference as πr.Find the sum of 1st and 2nd points. This is the final answer.
You find perimeter by adding all the sides of a figure.
All you do is add up all the sides to find the perimeter even though it is a odd shape
If you are given the diameter 'D' of the circle: the full circumference is (pi times D) the perimeter of the semicircle is half this plus the diameter Therefore: Pi x D /2 + D