Answer :
Final answer:
The Earth's axis is tilted at approximately 23.5 degrees, and there's no additional 'horizontal tilt.' For educational purposes, if you add the given angles of 23.5 degrees and 66.5 degrees, the sum would be 90 degrees.
Explanation:
The question addresses the combination of the Earth's axis tilt (about 23.5 degrees) and an unspecified "additional horizontal tilt" for which no specific value is provided. In reality, the Earth's axial tilt defines its orientation, and there is no inherent horizontal tilt to add. However, from a mathematical perspective, the sum of angles involves simply adding their measures.
Assuming a given horizontal tilt of 66.5 degrees, the sum would be 23.5 degrees (Earth's axis tilt) plus 66.5 degrees (additional tilt), resulting in a total of 90 degrees. This mathematical calculation illustrates the process of adding angles, even though the Earth's axial tilt is a fixed value and does not inherently include an "additional horizontal tilt" in the context of astronomical conventions.