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AP=1/4 *8=2 cm
segitiga PCG= siku siku
cari panjang PC dan PG
PC=√8^2+6^2=10 cm
PG=√8^2+10^2=√164 =2√41 cm
pake cara luas =luas
1/2*8*10=1/2*2√41*X
80=2√41 X
X=40/41 √41 cm