Answer:
S.A. = 60 in²
Step-by-step explanation:
We have 4 congruent triangles.
The formula of an area of a triangle:
[tex]A_\triangle=\dfrac{1}{2}bh[/tex]
b - base
h - height
We have b = 5in and h = 6in. Substitute:
[tex]A_\triangle=\dfrac{1}{2}(5)(6)=(5)(3)=15\ in^2[/tex]
The Surface Area of the triangular pyramid:
[tex]S.A.=4\cdot15\ in^2=60\ in^2[/tex]
