Answer:
[tex]\huge\boxed{\sf 51\ in.\²}[/tex]
Step-by-step explanation:
Area of square:
= Length * Length
Where length = 3 in.
= 3 * 3
= 9 in.²
Area of Triangle:
= 1/2 (Base)(Height)
Where base = 3 in. , Height = 7 in.
= 1/2(3)(7)
= 1/2 (21)
= 21/2
= 10.5 in.²
Area of 4 triangles:
= 4(Area of triangle)
= 4(10.5)
= 42 in.²
Surface Area of the pyramid:
= Area of square + Area of 4 triangles
= 9 + 42
= 51 in.²
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807
