Tolong isi nomor 19 yh pakai Cara

L1 = p × l
= 14 × 20
= 280 cm²

L2 = ½ × π × r²
= ½ × 22/7 × 7 × 7
= 77 cm²

Lttl = L1 + L2
= 280 + 77
= 357 cm² ( C )

L1 = P × L
= 20 cm × 14 cm
= 280 cm2
L2 = 1/2 × phi × r2
= 1/2 × 22/7 × 7×7
= 77 cm2

L1 + L2 = 280 cm2 + 77 cm2
= 357 cm2