Answer:
a) 266.39 unit^2.
Step-by-step explanation:
Area of the base = 8^2 = 64 .
There are 4 triangular sides.
To find the area of 1 side we need to know the slant height s of the triangle, This can be found using the Pythagoras Theorem
s^2 = 4^2 + 12^2 = 160
s = √160
So the area of 1 side = 1/2 * base * s
= 1/2 * 8 * √160
and
area of 4 sides
= 4 * 1/2 * 8 * √160
= 202.386
So the Surface area of the pyramid
= 64 + 202.386
= 266.386
