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luas 7 per 2
luasp per mukaan ..= 7,16
semoga bermanfaat
78,5=3,14r²
r²=78,5/3.14
r²=25
r=√25
r=5cm
s=√r²+t²
=√5²+12²
=√25+144
=√169
s=13cm
b. Ls = π×r×s
=3,14×5×13
=204,1cm
c.Lp=π×r(s+r)
=3,14×5(13+12)
=392,5cm²
klo msih bingung bsa hubuungi sya
smgga bermanfaat