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)
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
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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