Answer:
Step-by-step explanation:
The formula of an area of a circle:
[tex]A=\pi r^2[/tex]
r - radius
We have
[tex]A=706.9\ mm^2[/tex]
Substitute:
[tex]\pi r^2=706.9[/tex] divide both sides by π
[tex]r^2=\dfrac{706.9}{\pi}[/tex] use π ≈ 3.14
[tex]r^2\approx\dfrac{706.9}{3.14}\\\\r^2\approx225\to r=\sqrt{225}\\\\r= 15\ mm[/tex]
The diameter d = 2r.
Therefore
[tex]d=2(15)=30\ mm[/tex]
Answer:
30mm
Step-by-step explanation:
A=[tex]\pi[/tex][tex]r^{2}[/tex]
Substitute 706.9 for A and [tex]\pi[/tex] for 3.14
706.9= 3.14[tex]r^{2}[/tex] divided both sides by 706.9
when you divided 3.14 by 3.14 it will cross and when you divide 706.9 by 3.14 it will give you 225.
[tex]\sqrt{225}[/tex]
15 times 15 is 225
radius= 15
d=2r
multiply 15 by 2
the answer is 30.
