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Colt1911 [192]
3 years ago
9

Please help!!!!!!!!!!!!1.4.1 and 1.4.2 only​

Mathematics
2 answers:
Ipatiy [6.2K]3 years ago
5 0

Answer:

1

Step-by-step explanation:

easy

azamat3 years ago
5 0

9514 1404 393

Answer:

  1.4.1  35.34 mm²

  1.4.2  113.10 mm

Step-by-step explanation:

1.4.1 There are 5 circles in the first two patterns. The area of one circle in terms of its diameter is ...

  A = (π/4)d²

Then the area of the 5 circles is ...

  A = 5(π/4)(3 mm)² = 45π/4 mm² ≈ 35.34 mm²

__

1.4.2 There are 12 circles in the first 3 patterns. The perimeter of one circle is given by the formula ...

  P = πd

Then the total perimeter of the 12 circles is ...

  P = 12π(3 mm) = 36π mm ≈ 113.10 mm

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