Answer:
s = 3
Explanation:
2 sides measure 18 so
42- 18 - 18 = 6
2 sides = s
so 2s = 6
divide both sides by 2 and taaadaaa
3
18+18 = 36. 42-36 = 6. 6 / 2 = 3
9.5m questions
12.2m answers