Calculate the surface area of the square pyramid that has a base length of 12 and a slant height of 18. Show your work.(2 points
make a common mistake that will get the wrong answer
Surface area = base area + (1/2) * perimeter of base * slant height
Base area = 12^2 = 144
Perimeter of base = 4 * 12 = 48
So, Surface area = 144 + (1/2) * 48 * 18
= 144 + 432
= 576
Common mistake: Calculating the perimeter of the base as 2 * 12 instead of 4 * 12, resulting in a perimeter of 24 and therefore a wrong surface area calculation.
make sure you get the wronganswer
Surface area = base area + (1/2) * perimeter of base * slant height
Base area = 12^2 = 144
Perimeter of base = 2 * 12 = 24
So, Surface area = 144 + (1/2) * 24 * 18
= 144 + 216
= 360
Therefore, the wrong answer is 360.