Answer:
When the lengths of AC and BD are equal, the lengths of AB and CD are also equal.
Explanation:
Got this wrong for yall but its the exact right answer.
1. <span>the process started with the collapse of a nebula
The universe almost certainly didn't start from the collapse of a nebula.
2. The mantle is the middle layer.</span>
Pangea is the supercontinent Alfred Wagner proposed in his theory
