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Your pic is not there Nickolas !!

but

the surface area is the area of all the sides added together.

If yours is a square pyramid, like the ones in egypt, then it will have a square bottom and 4 triangle sides.  (it might not be a square pyramid though.)

You have to find the height of the slant height first. That is tricky you will need to think hard and use pythagoras's Theorum.

Then you can find all the areas and add them together :)

Welcome Piemanx!

This is a Math Forum it is really useful!!!!

~Nickolas

Well if so hear is the answer

Enter the equation Sin(30). If the answer comes up 0.5, your scientific …

Press the "Mode" button if your calculator was in radian mode. This …

Navigate to degrees mode if the list of modes comes up.

That should help.....

~Nickolas

A calculator?????

Thanks all !

What is the minimum possible value for y:

y = x^2 + 12x + 5

\(\begin{array}{|lrcll|} \hline & y &=& x^2 + 12x + 5 \\ & &=& (x+6)^2 -36+5 \\ & &=& (x+6)^2 -31 \qquad \text{min. if } x = -6 \\ & y &=& 0 -31 \\ & y &=& -31 \\ \hline \end{array}\)

The smallest value of the expression \(y= x^2 + 12x + 5\) is -31

If x is an integer, what is the smallest value of the expression x^2 - 6x +13?

\(\begin{array}{|lrcll|} \hline & y &=& x^2 - 6x +13 \\ & &=& (x-3)^2 -9+13 \\ & &=& (x-3)^2 + 4 \qquad \text{min. if } x = 3 \\ & y &=& 0 + 4 \\ & y &=& 4 \\ \hline \end{array}\)

The smallest value of the expression \(x^2 - 6x +13\) is 4