" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
obw.ABCD=37cm+35cm-30cm
obw.ABCD=42cm
AB=y
BC=x
CD=w
DA=z
AC=d
Ob ABC=x+y+d=x+y+15
Ob ACD=w+z+d=w+z+15
Ob ABCD = x+y+w+z
x+y+15=37
x+y=37-15=22
w+z+15=35
w+z=35-15
w+z=20
Ob ABCD = x+y+w+z=22+20=42