Question

cara mencari jari - jari jika diketahui panjang busur 1.256 dan sudut pusat 72°​

Answer 1

diket:

a = 72°

AB = 1256

dit:

r butsur?

Penyeleseian:

AB = a /360° x 2 π r

1256 = 72° /360° x 2 . 3,14 . r

1256 = 5 . 2 . 3,14 . r

1256 = 31,4 . r

1256/314 = r

r = 40