Jawaban:

1)

• Jawab:

K = 7 + 15 + 30 + 15 + 15

= 22 + 45 + 15

= 82 cm

K ½ lingkaran

= 1/2 × 2 × π × r

= 1/2 × 2 × 22/7 × 7

= 22 cm

K total = 82 cm + 22 cm

= 104 cm

Jadi, keliling bangun tersebut adalah 104 cm

__________________________

2)

• Jawab:

d = 22 cm

r = d/2 = 22/2 = 11 cm

L persegi = s × s

= 22 × 22

= 484 cm²

L ½ lingkaran

= 1/2 × π × r²

= 1/2 × 3,14 × 11 × 11

= 1/2 × 3,14 × 121

= 60,5 × 3,14

= 189,97 cm²

L bangun datar

= L persegi – L ½ lingkaran

= 484 cm² – 189,97 cm²

= 294,03 cm²

Jadi, luas bangun di samping adalah 294,03 cm²