tolong d bantu yh klo slh gpp dehh

1. (a.) K = 2 × π × r
= 2 × 22/7 × 14 cm
= 88 cm
(b.) Panjang busur AB
= 60°/360° × K
= 1/6 × 88 cm
= 14 2/3 cm
= 14,67 cm

2. (a.) L = π × r²
= 22/7 × (14 cm)²
= 22/7 × 196 cm²
= 616 cm²
(b.) L juring COD
= 90°/360° × L
= 1/4 × 616 cm²
= 154 cm²