Question

Tlong jwb pake cara, yg bsa d follow!!!!

Answer 1

8)
luas lingkaran = 48 cm²
besar sudut AOB = 135°
Luas juring :
= (sudut AOB/360°) x luas lingkaran
= 135/360 x 48
= 18 cm²

9)
r = 14 cm
sudut AOB = 90°

Luas lingkaran :
= phi * r²
= 22/7 * 14 * 14
= 616 cm²

Luas juring :
= (sudut AOB/360°) x Luas lingkaran
= (90°/360°) x 616
= 0,25 x 616
= 154 cm²

Luas segitiga AOB:
= 1/2 x AO x OB
= 1/2 x 14 x 14
= 98 cm²

Luas tembereng :
= luas juring - luas segitiga
= 154 - 98
= 56 cm²