Melody

that's funny 

I have no idea about chemistry but I will assume DavidQD knows what he is talking about and tick the answer.

I assume that the answer is in cm2.

And that it is perpendicular height.

And that our anonymous friends answer is in cm.

Then yes, that is a good answer.  

add  $$\left(\frac{14}{2}\right)^2 = 49$$

Try looking here.

Don't forget the dollar sign!

My goodness Chris you so look for the long way sometimes!

Just do it with an ordinary division. You get 56 with 1 left over 

That's   $$56\frac{1}{4}$$

or on a calculator

$${\frac{{\mathtt{225}}}{{\mathtt{4}}}} = {\mathtt{56.25}}$$

You go to Egypt and follow the tourist trail. 

That is A=1/2 * base * perpendicular height

This is the short version of what CPhill is telling you

$$log_bA = \frac{logA}{logb}$$

You can use whatever base you want - I suggest base 10 or base e so that you can do it on your calculator