" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
d₁=20cm
czyli
d₁=80cm-20cm
d₁=60cm d₂=80cm
bok obliczmy z cosinusów :
a=√30²+40²-2×30×40×cos90 cos90=0
a=√900+1600-0
a=√2500
a=50
P=(d₁×d₂):2
P=(60×80):2
P=4800:2
P=2400
Obw=4a
obw=4×50
obw=200