c. Keliling = 2 × (p + l)
= 2 × (40 cm + 25 cm)
= 2 × (65 cm)
= 130 cm
2. a. Panjang = (Keliling – (2 × Lebar)) : 2
= (88 cm – (2 × 12 cm)) : 2
= (88 cm – 24 cm) : 2
= 64 cm : 2
= 32 cm
c. Keliling = 2 × (p + l)
= 2 × (40 cm + 25 cm)
= 2 × (65 cm)
= 130 cm
2. a. Panjang = (Keliling – (2 × Lebar)) : 2
= (88 cm – (2 × 12 cm)) : 2
= (88 cm – 24 cm) : 2
= 64 cm : 2
= 32 cm
Editor: Nur Umar