plis yg pinter, pake cara aku test klian

luas ∆ PSR = 1/2 x alas x tinggi
= 1/2 x (4+6)x (8+8)
= 1/2 x 10 x 16
= 80 cm²

Luas ∆ PQR = 1/2 x 10 x 8
= 1/2 x 80
= 40 cm²

Luas ∆ PSR = 80 - 40 = 40 cm²