Jawaban:
luas = 482,25 cm²
keliling = 90 cm
Penjelasan dengan langkah-langkah:
Luas setengah lingkaran
= ½ × ( π × r² )
= ½ × ( 22/7 × 17,5 × 17,5 )
= ½ × 962,5 cm²
= 481,25 cm²
keliling bangun setengah lingkaran
= [½ × ( π × d )] + diameter
= [½ × ( 22/7 × 35 ) ] + 35
= (½×110) + 35
= 55 + 35
= 90
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Jawaban:
luas = 482,25 cm²
keliling = 90 cm
Penjelasan dengan langkah-langkah:
Luas setengah lingkaran
= ½ × ( π × r² )
= ½ × ( 22/7 × 17,5 × 17,5 )
= ½ × 962,5 cm²
= 481,25 cm²
keliling bangun setengah lingkaran
= [½ × ( π × d )] + diameter
= [½ × ( 22/7 × 35 ) ] + 35
= (½×110) + 35
= 55 + 35
= 90