Answer:
B. 15 square meters (for the triangles)
D. 25 square meters (for the square base)
Bonus: The total surface area would be 85 square meters.
Step-by-step explanation:
The square base is easier to deduce here; simply square 5 to get 25 square meters for the base.
The triangles require some math, however. But it is relatively simple
(5 * 6)/2
30/2
15 square meters for the triangles.
For bonus, I'll find the total surface area.
5² + 4((5 * 6)/2)
<em>First, square 5 to get 25.</em>
25 + 4((5 * 6)/2)
<em>Now multiply 5 * 6 to get 30.</em>
25 + 4(30/2)
<em>Then divide 30 by 2 to get 15.</em>
25 + 4(15)
<em>Now multiply 4 by 15 to get 60.</em>
25 + 60
<em>Lastly, add 25 and 60 to get 85.</em>
The entire square pyramid's surface area is 85 square meters.
<em>I hope this helps! ヽ(*⌒▽⌒*)ノ</em>