Question

Tolong jawab pake cara ya

Answer 1

2)
L.diarsir = L.lingkaran - L.persegi
L.D = phi × r^2 - s^2
L.D = 3,14 × 25 - 25
L.D = 78,5 - 25
L.D = 53,5 cm^2

3)<AOC = 180 - 72 = 108°
a) <AOC/AC = <BOC/BC
108/AC = 72/12
108/AC = 6
6AC = 108
AC = 18 cm

b)L = sudut × phi × r^2
L = 72/360 × 22/7 × 7 × 7
L = 5 × 22 × 7
L = 770 cm^2

4)<ACB = <ADB = <AEB
3y = 165
y = 55°

<AOB = 55 × 2 = 110°