<PRE><B>Question 124468</B>
What is the area of a circle with diameter 34mm? &lt;br&gt;&lt;br&gt;

The formula for this is:
{{{A=pi*r^2}}}&lt;br&gt;&lt;br&gt;

Since your problem gives the diameter, just half this amount to find the radius, which is 17. &lt;BR&gt;&lt;br&gt;

Now you have: 
{{{A=pi*17^2}}}&lt;br&gt;&lt;br&gt;

Solve the exponent:
{{{A=pi*289}}}&lt;br&gt;&lt;br&gt;

Multiply:
{{{A=2852.315672mm}}}&lt;br&gt;&lt;br&gt;

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