1. Use the animation button or the slider to get orthogonal projections of point A on the projection planes. You see three projections of the same object. Each projection has its own designation A, which shows the location on a specific projection plane - A' on a horizontal plane or top view, A" on one vertical plane or front view, and A''' on a second vertical plane or left side view.

2. With the mouse rotate turned screens until point A coincides with its orthogonal projection - top, front and left views. This exercise will help you better understand orthographic projections.

The locations of the orthogonal projections are different - this is the main difference between the orthogonal projections of the first and third angles.

The 3rd angle projections are where the 3D object is visible in the 3rd quadrant. It is positioned below and behind the view planes, the planes are transparent, and each view is mapped to the plane closest to it. The front projection plane is between the observer and the object.

1. Use the animation button or the slider to get orthogonal projections of point A on the projection planes. 

2. With the mouse rotate turned screens until point A coincides with its orthogonal projection - top, front and left views. 

Did you already notice that all orthogonal projections are connected to each other, and the connection lines are perpendicular and parallel to the X, Y, Z axes?

These lines help to check the correctness of the construction of orthogonal projections and determine the coordinates of the projections.

1. Change coordinates of points A and B

2. Use the slider or the animation button to rotate the projections and get a 2D drawing of orthogonal projection points.