" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
Pc=2×a×b+2×a×c+2×b×c
4m/7m/2m
Pc=2*4*7+2*4*2+2*7*2
Pc=56+16+28=100
2cm x 4,5cm x 3,5cm
Pc=2*2*4,5+2*2*3,5+2*4,5*3,5
Pc=8+14+31,5
=53,5
c)11dm x 11dm x 11dm
Pc=2*11*11+2*11*11+2*11*11
Pc=242+242+242
726
d)25mm x 4,7cm x 0,2 dm
25mm=2,5cm
0,2dm=2cm
2*2,5*4,7+2*2,5*2+2*4,7*2=52,3
b) 63,4cm²
c) 726dm²
d) 52,3cm²
A) p=2(4X7 +7X2 +4X2)=2( 28+14+8)=2X 50M=100m
b) p=2(9 +15,75+7)=31,75 cmx2=63,5cm
C) p=2 (121+121+121)=726dm
D) 2,5 cm, 4,7cm, 2cm
p= 2(11,75+9,4+5)=52,3 cm