Question

Tolong jawab no 27 pake cara makasih

Answer 1

Panjang busur....
= α / 360° x 2 π r
= 135°/360° x 2 x 3,14 x 4
= 9,42 cm

Answer 2

Diket,r = 4cm
sudut pusat=135°
Ditanya,panjang busur...?
jawab,panjang busur=sudut pusat/360° × Kel.lingkaran
panjang busur = 135°/360° × 2×3,14×4
=15 × 2 × 3,14
= 30 × 3,14
= 9,42 cm2

semoga membantu....