bantuin dong no 1,2,3 pliss

1). Diketahui: s = 4 cm.
Panjang diagonal sisi = s√2
= 4√2
= 4 × 1,414
= 5,656 cm
Panjang diagonal ruang = s√3
= 4√3
= 4 × 1,732
= 6,928 cm
2). Luas alas = 16
s² = 16
s = √16
s = 4 cm
Panjang diagonal ruang = s√3
= 4√3
3). Panjang diagonal ruang = s√3
√75 = s√3
s = √75/√3
s = √25 = 5 cm.