Answer:
The surface area of the square pyramid is 280 units².
Step-by-step explanation:
As we know that the total surface area of a square pyramid can be obtained by identifying the length 'b' of its base and its slant height 's' by using the formula:
[tex]A=2bs+b^2[/tex]
From the figure, it is clear that
- length of its base = 'b' = 9
substituting the values in the formula
[tex]A=2bs+b^2[/tex]
[tex]A=2[/tex] [tex](10)[/tex] [tex](9)+(10)^2[/tex]
[tex]=2[/tex] [tex](10)[/tex] [tex](9)+100[/tex]
[tex]=280[/tex]
Therefore, the surface area of the square pyramid is 280 units².
