No. 10 & 11 gmn gan? #no spam #kasih caranya

10. OA = √OP^2 – AP^2
= √50^2 – 40^2
= √2500 – 1600
= √900
= 30 cm
Mencari luas segitiga OAP
L = a × t / 2
= 30 × 40 /2
= 1200/2
= 600 cm^2

Mencari luas layang2 OAPB
L = Luas Segitiga OAP × 2
= 600 × 2
= 1200 cm^2

Pencari panjang busur AB
L = AB × OP / 2
1200 = AB × 50/2
1200 = AB × 25
AB = 1200/25
AB = 48 cm (d)

11. D^2 = P^2 – (R+r)^2
= 13^2 – (3+2)^2
= 169 – 25
= 144
D = √144 (a)