Question

Calculate the area of a circle with diameter of 1.8m please help!

Answer 1

Circle area formula =
$\pi {r}^{2}$
half of the diameter is radius(r) so 1.8÷2 = 0.9m

$\pi \times {0.9}^{2} =$
${2.54m}^{2}$

Answer 2

Area of a circle =pi (3.14)r^2  
Radius = 1/2 diameter 
radius = 1/2 1.8 
r = 0.9 

Area = 3.14 x (0.9^2) 
Area = 3.14 x 0.81
Area = 2.5434 (and you can round off to nearest tenth or hundredth)