Question

Find the area of the circle.
Use 3.14 for T.
d = 8 cm
A = [?] cm²
A = πr²

Answer 1

50.24cm²

Explanation:

`Here, \\\hookrightarrow d=8cm\\\\\hookrightarrow r=d/2=8cm/2=4cm\\\\Now,\\\\\hookrightarrow Area=\pi r^(2) \\\\\hookrightarrow Area=3.14 * (4cm)^(2) \\\\\hookrightarrow Area=50.24cm^(2)`

Answer 2

50.24 cm²

Explanation:

The formula of circle's area is
`\displaystyle{A = \pi r^2}` which is given in your problem. We are given 3.14 for
`\displaystyle{\pi}` so we will have an equation of:

`\displaystyle{A = 3.14 \cdot r^2}`

r is radius which is a half of diameter. Diameter (d) is given as 8 cm and the half of diameter (8 cm) is 4 cm. Hence, radius is 4 cm. Therefore:

`\displaystyle{A = 3.14 \cdot 4^2}`

Evaluate for the area:

`\displaystyle{A = 3.14 \cdot 16}\\\\\displaystyle{A = 50.24}`

Hence, the area is 50.24 cm²

Note that area is a shade of two-dimensional figure so we use cm squared and not only cm as that only applies to one-dimensional such as line.