Answer:
27 cm^2
Step-by-step explanation:
The surface area of this pyramid is given by this formula:
● Sa = area of the base + area of the sides *4
The faces are triangles.
The area of a triangle is:
● A = (b*h)/2
b and h are the base and the heigth
● A = (3*3)/2 = 9/2 = 4.5
The base is a square since all the sides are equal to each other.
The area of a square is:
● A'= a^2
a is the side
● A'= 3*2 = 9
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● Sa = A' + 4*A
● Sa = 9 + 4×4.5
● Sa = 27 cm^2
