minta bantuanya dong

13. L.persegi=7×7=49 cm^2
L.lingkaran=22/7×1/4×7×7
=22×7÷4. = 38,5 cm^2
L arsir=49 cm^2-38,5cm^2
=10,5cm^2. D.

14. L.persegi=28×28. =784 cm^2
L.ling=22/7×1/4×4×14×14
=22×2×14. =616 cm^2
L.arsir= 784-616
=168 cm^2. D.

semoga berguna
maaf kalau salah^_^