Final answer:
To define the coordinate system for a semielliptical dome, we can choose the center of the semiellipse as the origin, the x-axis as the horizontal line through the center, and the y-axis as the vertical line through the center.
Step-by-step explanation:
To define the coordinate system for the semielliptical dome, we can use the given information.
Let's choose the center of the semiellipse as the origin (0,0) and the x-axis as the horizontal line passing through the center.
The y-axis can be the vertical line passing through the center.
The vertices of the semiellipse will have coordinates (-49,0) and (49,0). The top of the ceiling will have coordinates (0,21).
This coordinate system will help us locate any point on the semielliptical ceiling of the dome.