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.
Proof: Triangle altitudes are concurrent (orthocenter) Showing that any triangle can be the medial triangle for some larger triangle. Using this to show that the altitudes of a triangle are concurrent (at the orthocenter). Created by Sal Khan. Altitudes. Proof: Triangle altitudes are concurrent (orthocenter) Common orthocenter and centroid.