Question

What is the area of a circle with a diameter of 36 milimeters? use 3.14 for pi

Answer 1

1017.36mm²

Explanation:

Since the diameter of that circle is 36mm, the radius would be equal to half the diameter

i.e. r =
`(d)/(2)` (where d is the diameter of the circle)

r =
`(36)/(2) mm`

r = 18mm

Area of a circle =
`\pi`r² (where r is the radius of the circle)

Using 3.14 for
`\pi`,

Area of the circle = (3.14 × 18²)mm²

= (3.14 × 18 × 18)mm²

= (3.14 × 324)mm²

= 1017.36mm²

Hope this helps :))

Answer 2

1017.36 mm²

Explanation:

d = 2r => r = d/2 = 36mm/2 = 18 mm

A = π·r²

= 3.14×(18mm)²

= 3.14×324mm²

= 1017.36 mm²