Question

Bantu 3 & 4 lah....plis

Answer 1

3)
= keliling lingkaran + 3d
= (πd) + 3d
= (22/7 x 35) + (3 x 35)
= 110 + 70
= 180 cm

4) 
cari garis singgung persekutuan luar
l² = p² - (R - r)²
l² = 13² - (9 - 4)²
l² = 169 - 25
l² = 144
l = 12 cm

panjang lilitan = 1/2 keliling lingakarn 1 + 1/2 kelililing lingkaran 2 + 2l
= (1/2 x πd) + (1/2 x πd) + (2 x l)
= (1/2 x 3.14 x 8) + (1/2 x 3.14x 18) + (2 x 12)
= 12.56 + 28.26 + 24
= 64.82 cm

Maaf kalau salah^^