The image on the right shows a wooden watch face - Leaving Cert DCG - Question C-2 - 2019

Divide the square ABCD into equal sections. Given the scale of 1:1, mark grid lines extending from A to B, B to C, C to D, and D to A. Include additional divisions diagonally to emphasize the parabolic surface.

To outline the hyperbolic paraboloid in elevation, draw a curve that represents the parabolic shape from points A to D at the specified heights. Ensure symmetry along the central axis, making the transition smooth and continuous.

In the elevation, include horizontal divisions across the parabolic surface. These divisions should represent changes in elevation, visually enhancing the parabolic shape.

Finalize the elevation by refining the curves and adding hidden lines where necessary. This detail ensures clarity in understanding the depth of the hyperbolic surface.

Heights and widths of surface ABCD can be determined by identifying specific height values at points A, B, C, and D where they intersect the parabolic curve, ensuring they align with the given dimensions.

Sketch the hyperbolic paraboloid surface using the previously determined heights and widths. This outline will include the necessary curvature to represent the parabolic shape accurately.

Represent the elements of the parabolic surface by plotting grid lines and additional curves that emphasize the 3D form of the hyperbolic paraboloid.

Complete the end view by ensuring all curves are drawn smoothly, with hidden details represented where applicable. This gives a comprehensive view of the overall parabolic structure.

Ensure the final presentation is neat and well-structured. Use appropriate shading and line weights to highlight the parabolic surface and provide clarity to the elevations and plans.