Exercise 15.2

The projection of a side of a triangle onto another line is the perpendicular distance from the endpoint of that side to the line. It represents the shadow or orthogonal projection of the side onto the line.

To find the projection of a side of a triangle onto a given line, you can follow these steps:

• Identify the side of the triangle and the line onto which you want to project the side.
• Draw a perpendicular line from the endpoint of the side to the given line. This perpendicular line represents the projection of the side onto the line.
• Measure the length of the perpendicular line, which is the distance from the endpoint of the side to the line. This measurement represents the projection of the side onto the line.