Half circle is known as semi-circle. Centroid of semi-circle is at a distance of 4R/3π
from the base of semi-circle. As shown in the figure below:
Centroid of Semi-circle Formula:
\(\bar{Y}= \frac{4R}{3π }\)
Example
Find the centroid of semi-circle whose radius is 10cm and of 20cm diameter.
Centroid of semi circle example
Solution
By using formula for semi-circle
Centroid of semi-circle = 4R/3π = (4*10)/3π = 4.24cm = Answer
This distance is from the base line of semi circle.