It is okay to use welding equipment you have no training with when it is similar to equipment you already use.

No. even if the equipment is similar you have to have specific training and Welding you have to use specific equipment and it can be dangerous if you don't know the guidelines

No, there is a big risk of injury since you have no training and what equipment is similar to welding?

Explanation:

they are best described as reliable search engines.

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34