The surface area of the pyramid is 576.
<em>The square base is 144. It's just a square, so you multiply 12 (length) and 12 ( width) , which equals 144. </em>
<em>Then you find the area of one of the triangles. The equation to find triangles goes like this: 0.5 x B (base: 12) x H (height: 18). That would be 6 x 18 which is 108.</em>
<em>Since you got the area of 1 triangle and there are 4 triangles you have to multiply 108 by 4. That'll give you 432.</em>
<em>SO since you have the area of all the triangles and the square base the last thing you have to do is just add it all up. </em>
<em>The area of the triangles plus the area of the square base = the surface area.</em>
<u>432 cm + 144 cm =576 cm.</u>
Answer
254 feet
explanation
212 + (14 x 3)
To greatest common factor of the two is 3. 15/18 simplified is 5/6.
Completing the square is done as follows:<span>
1. Write
the equation in a way that the constants are in the right side while the terms
with x are on the left.
9x2 +54x = 7
2.
Make sure that the coefficient of the x^2 term is 1.
9(x2 + 6x) = 7
<span>3.
Adding a term to both sides that
will complete the square in the left side. This is done by dividing the
coefficient of the x term by 2 and squaring it. Note: The same amount should be
added to the right side to balance the equation.</span>
9(x2 + 6x + 9) = 7 + 81
<span>9(x+3)^2 = 88</span></span>
