Pakai cara ya.. .. .. .. .

Luas Segitiga :
L = ½ × a × t
L = ½ × 21 × 15
L = 21 × 7,5
L = 157,5 cm²

Luas Trapesium :
L = ½ × JSS × t
L = ½ × (21 + 58) × 18
L = 79 × 9
L = 711 cm²

Luas Persegi Panjang :
L = p × l
L = 21 × 10
L = 210 cm²

Luas Gabungan :
L = 157,5 cm² + 711 cm² + 210 cm²
L = 1.078,5 cm²

Maaf Kalau Salah

bgn 1 segitiga
bgn 2 trapesium

bgn 1 L=a × t : 2
=10 × 15 : 2
=72 cm

bgn 2 L=a + b : 2 × t
=58 + 21 :2 × 18
=247 cm