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=3/4.3,14.10.10
=3/4.314
=235,5cm²(B)
32.luas setengah lingkaran=1/2.π.4.4
=8π
luas 1/4 lingkaran=1/4.π.4.4
=4π
luas bangun gabungan=8π+4π=12π(c)
33.luas segitiga=a.t/2=16.12/2=96cm²
r=1/2.√AB²+BC²
=1/2.√16²+12²
=1/2.√256+144
=1/2.√400
=1/2.20
=10CM
LUAS LINGKARAN=π.r²
=3,14.10.10
=314 cm²
luas daerah yg diarsir=luas lingkaran-luas segitiga=314-96=218cm²(d)
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