avanijanae avanijanae
  • 22-07-2021
  • Mathematics
contestada

identify the area of a regular decagon with side length 2 m rounded to the nearest tenth

Respuesta :

jcherry99
jcherry99 jcherry99
  • 22-07-2021

Answer:

Area = 14.8

Step-by-step explanation:

Area = 5/2 + a^2*sqrt(5 + 2 sqrt(5) )

This formula given the side length, calculates the area.

a = 2

Area = 2.5 + 2^2 * sqrt(5 + 2*sqrt(5) )

Area = 2.5 + 4 * sqrt(5 + 2*2.236)

Area = 2.5 + 4* sqrt(5+ 4.4721)

Area = 2.5 + 4*sqrt(9.4721)

Area = 2.5 + 4*3.0776

Area = 2.5 + 12.3107

Area = 14.8107

Answer Link
madamsva madamsva
  • 17-07-2022

Answer:

A ≈ 30.8 m2

Step-by-step explanation:

Ver imagen madamsva
Answer Link

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