30).La=πr²=22/7×7×7=22/7×49=154cm²
=La×t=154×20=3080cm²
31).jawabanya d(-2,6)
33).jawabanya d 4
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30).La=πr²=22/7×7×7=22/7×49=154cm²
=La×t=154×20=3080cm²
31).jawabanya d(-2,6)
33).jawabanya d 4