2 Answers

Venimus · Answer 1 · 2019-06-10T13:16:05+0000

Answer:

Total Surface Area of the given regular pyramid = 153 units²

Explanation:

Base length of the regular pyramid, l = 9 units

Base width of the regular pyramid, w = 9 units

Height of the regular pyramid, h = 7 units

Perimeter of base = 3 × 9

= 27 units

$\text{Area of base = }\frac{1}{* Base* Height\\\\Area = (1)/(2)* 9* 7=21.5\:\:units^2$

$\text{Now, Total Surface Area = }(1)/(2)* p* l+A\\\\\implies\text{Total Surface Area = }(1)/(2)* 27* 9+31.5$

Hence, Total Surface Area of the given regular pyramid = 153 units²

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