bantuin dongg,,,, pakai cara ya!

L. 1/2 Lingkaran
= 1/2 × ∏ × r × r.
= 1/2 × 3,14 × 10 × 10.
= 1/2 × 3,14 × 100.
= 1/2 × 314.
= 157cm⁲.

L. Persegi panjang
= p × l.
= 40 × 20.
= 800cm⁲.

L. Segitiga
= 1/2 × a × t.
= 1/2 × 20 × 16.
= 1/2 × 320.
= 160cm⁲.

L. Seluruhnya
= 157 + 800 + 160.
= 1.117cm⁲.

Jawaban : C.