Last Updated on October 8, 2025 by Maged kamel
Video for Iy for a triangle.
A video explains how to determine the Moment of inertia in the y-direction for a triangle. The y-axis is passing by the left point at a.. Consider the triangle as an assembly of two right-angle triangles combined in cases 1 and 2.
The y-axis passes by the left corner of the triangle, and the inertia is the sum of the inertia at each right angle Cg, plus the sum of multiples of Area by the square of the relative x distance from Cg to the left point.
Please watch the video for more details and review the source post for illustration.
The previous video is No. 18 – Video for Ix for a triangle.
The related post is Post 14: The Moment of Inertia Iy for a Triangle.
The next video is for Iy at the CG for a triangle.