tolong dijawab besok dikumpulkan.mohon pakai cara

10. Luas= 1/2 × diagonal 1 × diagonal 2
= 1/2 × 47 × 56
= 1/2 × 2632
= 1316 cm persegi (2)

11. Luas= 1/2 × diagonal 1 × diagonal 2
= 1/2 × 44 × 20
= 1/2 × 880
= 440 cm persegi

12. Luas= 1/2 × diagonal 1 × diagonal 2
= 1/2 × 53 × 46
= 1/2 × 4238
= 1219 cm persegi

13. Luas= 1/4 × phi (22/7) × 42 ×42
= 1/4 × 132 × 42
= 1/4 × 5544
= 1386 cm persegi

14. Luas= 1/4 × phi (3,14) × 24 × 24
= 1/4 × 3,14 × 576
= 1/4 × 1808,64
= 452,16 cm persegi