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LTrapesium = (28+40).10/2
=68.5 = 340
LBelah ketupat= d1.d2/2
=10.24/2
=120
340+120= 460
23> St = 15 triple phytagoras
gatau lagi
24> (2.24/18-1).5
=(8/3-1).5
=1,6 . 5
=8
luas trapesium= 28+40x10/2= 340
luas belah ketupat = 10x24/2 = 120
340+120= 460 (c)
23. PS/SR = RT/QR
PS/12 = 8/21
21PS = 8.12
PS= 96/21= 4
maaf kalo salah