Nomor 3&4 Tolong Besokkkk Dikumpulkan Pake Cara

3)PQ=20
PO=√20²-12²
=√400-144
=√356
=18,87
QR=√12²+2,13²
=√144+4,5369
=√148,5369
=12,187575
4)½d=√10²-8²
=√100-64
=√36
=6
d=6+6=12
L=½d1xd2
=½.16.12
=½.192
=96