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Verified answer
6)RP=√PQ²+RQ²
=√(16cm)²+(12cm)²
=√256cm²+144cm²
=√400cm²
=20cm
d=RP=20cm
r=d/2
=20cm/2
=10cm
L O=πr²
=3,14(10cm)²
=3,14(100cm²)
=314cm²
L PQRS=p×l
=PQ×RQ
=16cm×12cm
=192cm²
L arsir=L O-L PQRS
=314cm²-192cm²
=122cm²
7)
d=2r
=2(30cm)
=60cm
L ABCD=d²/2
=(60cm)²/2
=3.600cm²/2
=1.800cm²
L O=πr²
=3,14(30cm)²
=3,14(900cm²)
=2.826cm²
L arsir=L O-L ABCD
=2.826cm²-1.800cm²
=1.026cm²
8)
QR=√RP²+PQ²
=√(12cm)²+(9cm)²
=√144cm²+81cm²
=√225cm²
=15cm
L arsir=1/2L O-LΔPQR
=1/2(πr²)-(a×t/2)
=1/2(3,14(15cm)²)-(9cm×12cm/2)
=1/2(3,14(225cm²)-(9cm×6cm)
=1/2(706,5cm²)-54cm²
=353,25cm²-54cm²
=299,25cm²