Hello Community Firstly this is not a homework question despite the problem appearing to be very homework like. I work in engineering. I am trying to determine the amount of clearance I have from a point on the ground to a wall. I have two points, Point A and Point B. Point A is 30mm Higher than Point B. If I measure horizontally in the plane of points A and B to the nearest point on the wall I get 650 and vertically I get 800. If I was to rotate point A about Point B such that Point A is now 90mm higher then Point B what would my new horizontally and vertical distance to the wall be? After a few days working on this problem I cannot seem to make any progress. Attached is a picture of the problem. Can someone shed any light? Thank You.