Answer:
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Hmm they're both even numbers so maybe we can start by cutting each number in half.

18 and 48 had 2 as a common factor.
So factoring a 2 out of each number was the same as cutting each number in half. Try to do something similar with the 9 and 24. They each have something in common.
What exactly are we solving?? the rest of the angles or the perimeter?
1. 5, 19, 24, 46, 77, then 98
2. -62, -47, -11, 38, then 56