Jawaban:
r=42:2=21
rumus kll lingkaran 2xπxr
2x3,14x21=132
karena setengah lingkaran di bagi 2
132:2=66
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Jawaban:
semoga membantu :D
r=42:2=21
rumus kll lingkaran 2xπxr
2x3,14x21=132
karena setengah lingkaran di bagi 2
132:2=66