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Karo-lina-s [1.5K]
3 years ago
7

How much material is needed to make the Nón Lá Vietnamese leaf hat? Round to the nearest tenth.

Mathematics
1 answer:
Rufina [12.5K]3 years ago
8 0

9514 1404 393

Answer:

  408.4 in²

Step-by-step explanation:

The lateral area of a cone is ...

  LA = 1/2πds . . . . . . . where d is the diameter and s is the slant height

Using the given dimensions, the area of the hat is ...

  LA = 1/2π(20 in)(13 in) = 130π in² ≈ 408.4 in²

The surface area is about 408.4 in².

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