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Answer:
1. 12,469
2. 5.2
3. I don't know sorry!
Step-by-step explanation:
1. Divide the diameter by 2 which gives you 63
So, A = πr2 = π·63^2 ≈ 12468.98
2. Looks like the bigger triangle is twice as big as the smaller circle
so, 2.6 x 2= 5.2