Answer:

The symbol of a rectangle in a flowchart represents the start or end point of a program. This means that when a flowchart begins or ends, it is represented by a rectangle shape. This rectangle is typically placed at the top or left side of the flowchart to signify the starting point of the program and at the bottom or right side to represent the end point.

Explanation:

Flowcharts are graphical representations of a process or algorithm, used to visually depict the steps involved in solving a problem or executing a program. They are composed of various symbols that represent different types of actions or operations.

The rectangle symbol in a flowchart serves as a marker for the start or end of the program. It indicates the point from which the program begins its execution and the point at which it finishes. The rectangle symbol is usually labeled with the words "Start" or "End" to clearly indicate its purpose.

The start point of the program is where the flowchart begins. It signifies the initiation of the program's execution and is the first step in the process. The end point, on the other hand, represents the termination of the program. It indicates that all the necessary steps or actions have been completed and the program can be concluded.

The rectangle symbol is essential in flowcharts as it provides a clear and concise representation of where the program starts and ends. It helps users understand the flow of the program and allows them to follow the logical sequence of actions.

In summary, the rectangle symbol in a flowchart represents the start or end point of a program. It signifies the initiation and termination of the program's execution and is a key element in visually depicting the flow of a process or algorithm.