caranya gimana ya, susah bgt

Bab Bangun Ruang

Cari dulu panjang TP
TP² = (PQ - TU)² + QU²
TP² = 5² + 12²
TP² = 25 + 144
TP = √169
TP = 13 cm

Luas permukaan
= 2 × 1/2 × (PQ + TU) × QU + PS(PQ + QU + TU + PT)
= 2 × 1/2 × (15 + 10) × 12 + 9(15 + 12 + 10 + 13)
= 25 × 12 + 9 × 50
= 300 + 450
= 750 cm² [D]