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Sagot :
Ⲁⲛ⳽ⲱⲉⲅ:
- 39 m²
Ⲋⲟⳑⳙⲧⳕⲟⲛ :
Information provided with us:
- Side length ( a ) = 3m
- Slant height ( l ) = 5m
Ⳙ⳽ⲓⲛⳋ ⳨ⲟⲅⲙⳙⳑɑ :
Surface area of square pyramid is given by the sum of areas of all its 4 triangular sides and the square base area. If a is the base side length and l is the slant height , then the surface area of square pyramid is:
ㅤㅤㅤㅤㅤ➙ a² + 2al
Ⲧⲏⲉⲅⲉ⳨ⲟⲅⲉ:
ㅤㅤㅤ➙ A = a² + 2al
ㅤㅤㅤ➙ A = ( 3 ) ² + 2 × 3 × 5
ㅤㅤㅤ➙ A = 9 + 30
ㅤㅤㅤ➙ A = 39m²
~Hence, the surface area of given square pyramid is 39 m².
Answer:
39 m²
Step-by-step explanation:
surface area of square based pyramid = [tex]a^2+2al[/tex]
(where [tex]a[/tex] is the side length of the base and [tex]l[/tex] is the slant height)
Given:
- [tex]a=3[/tex]
- [tex]l=5[/tex]
⇒ SA = 3² + (2 x 3 x 5) = 39 m²
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