Berapakah luas permukaan bangun setengah bola tertutup berikut a 8 cm

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Diketahui: jari-jarinya adalah  , . 

Bangun tersebut merupakan setengah bola tertutup atau setengah bola pejal.

Ditanya: Luas permukaan bangun setengah bola tertutup?

Jawab:

Ingat kembai rumus luas permukaan setengah bola tertutup:

Maka

Jadi, luas permukaan bangun setengah bola tertutup tersebut adalah .