jocelyns5043
jocelyns5043 jocelyns5043
  • 26-05-2022
  • Mathematics
contestada

Hey can someone help me I dont really undertstand this, (thank you ^^)

Hey can someone help me I dont really undertstand this thank you class=

Respuesta :

mathstudent55
mathstudent55 mathstudent55
  • 26-05-2022

Answer:

exact area = 81π in.²

approximate area = 254.34 in.²

Step-by-step explanation:

Exact:

area = πr²

r = radius = diameter/2 = 18 in./2 = 9 in.

area = πr²

area = π × (9 in.)²

area = 81π in.²

exact area = 81π in.²

Approximate:

π = 3.14 (approximately)

area = πr²

area = 81π in²

area = 81 × 3.14 in.²

approximate area = 254.34 in.²

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