Rodents & other pests will never get used to the ultrasonic sound waves emitted from this repeller. The Attack Wave effectively protects an area up to 4,000 - 5,000 unobstructed square feet. In a home with rooms, hallways, and furniture the effective range is closer to 2000 square feet.
Definition. of the Centroid of a Triangle. The Centroid is a point of concurrency of the triangle. It is the point where all 3 medians intersect and is often described as the triangle's center of gravity or as the barycent.1  It is formed by the intersection of the medians.he Centroid is a point of concurrency of the triangle. It is the point where all 3 medians intersect and is often described as the triangle's center of gravity or as the barycent. 1  It is formed by the intersection of the medians.
How does one calculate the centroid of an equilateral triangle using integration. I will assume the equilateral triangle of side one with a vertex at the origin. Clearly, the $x$-centroid is $\bar{x} = 1/2$ by symmetry, so we need only find $\bar{y}$. The expression for the centroid of a region $R$ is $$\bar{y} = \frac{\displaystyle\iint_R dA \, y}{\displaystyle\iint_R dA}$$ It's all about picking the bounds of the integral. In this case, you can see that the triangle is bounded by the lines $x=y/\sqrt{3}$ and $x=1-y/\sqrt{3}$.