Jawaban:

5. • V = 1.331 cm³

• Lp = 726 cm²

6. • V = 336 cm²

• Lp = 292 cm²

7. • V = 64 cm³

• Lp = 144 cm²

Penjelasan dengan langkah-langkah:

5. Kubus

• V kubus

= R x R x R

= 11 x 11 x 11

= 1.331 cm³

• Lp kubus

= 6 x R²

= 6 x 11²

= 6 x 121

= 726 cm²

6. Balok

• V balok

= p x l x t

= 6 x 7 x 8

= 336 cm³

• Lp balok

= 2 x ( pl + pt + lt )

= 2 x (( 6 x 7 ) + ( 6 x 8 ) + ( 7 x 8 ))

= 2 x ( 42 + 48 + 56 )

= 2 x 146

= 292 cm²

7. Limas

• V limas

= ⅓ x La x t

= ⅓ x ( S x S ) x t

= ⅓ x ( 8 x 8 ) x 3

= ⅓ x 64 x 3

= 64 cm³

• Lp limas

= La + ( 4 x L sisi tegak )

= ( S x S ) + ( 4 x ½ x a x t )

= ( 8 x 8 ) + ( 4 x ½ x 8 x 5 )

= 64 + 80

= 144 cm²

Semoga dapat membantu

dan mohon maaf bila salah