Tolong bantu jawab ya kak!!!yang no.4 & no.5

5. Keliling Belah Ketupat = 4 × Sisi
40 = 4 Sisi
Sisi = 10 cm
- Diagonal 2 = (✅6 (pangkat 2) - 4 (pangkat 2) × 2
Diagonal 2 = ✅ 64 × 2
Diagonal 2 = 8 × 2 = 16 cm