Question

Sam built a circular fenced-in section for some of his animals .the section has a circumference of 55 meters .what is the approximate area ,in square meters ,of the section ?

Answer 1

Find radius

• r=Circumference/2π
• r=55/2π
• r=8.8m

Area

• πr²
• π(8.8)²
• 243m²

Answer 2

• 243 m²

Explanation:

Area of circle:

• A = πr²

Circumference of circle:

• C = 2πr

Given

• C = 55 m

Find r using the second formula:

• 2πr = 55
• 2*3.14r = 55
• r = 55/6.28
• r = 8.8 (rounded)

Find area using the first formula:

• A = 3.14*8.8²
• A = 243 m² (rounded)