tolong dijawab pakai cara

PQ
= akar TQ^2 - TP^2
= akar 39^2 - 36^2
= akar 225
= 15 cm

AB = 2× PQ = 30 cm

TB
= akar TQ^2 + PQ^2
= akar 39^2 + 15^2
= akar 1.066
= 32,6 cm

keliling
= 4 × AB + 4 x TB
= 4 × 30 + 4 × 32,6
= 120 + 130,4
= 250,4 cm

L-permukaan
= 30^2 + 4 × 1/2 × 30 × 39
= 900 + 2.340
= 3.240 cm^2