Answer:
[tex]82,8m^2 = S.A[/tex]
Step-by-step explanation:
Area of a Rectangle: [tex]hb\:or\:wb = A[/tex]
Area of a Triangle: [tex]\frac{1}{2}hb; \frac{1}{2}bh, or\: \frac{hb}{2} = A[/tex]
Need to know
- Two small triangles
- Two big triangles
12m² = Rectangle
26,4m² EACH = Big Triangles
9m² EACH = Small Triangles
[tex]2[9] + 2[26,4] + 12 = 18 + 52,8 + 12 = 82,8[/tex]
So, the surface area of the rectangular pyramid is 82,8m².
* The answer is not 85,31 because this rectangular pyramid has two slant heights. If we ONLY had 9 as ONE SLANT HEIGHT, then the answer would have been 85,31, otherwise it is incorrect.
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