Răspuns:
P =144cm
L =2 l
P =2L+2 l
144 =4 l +2 l
6 l =144
l =144:6 =24 cm
L =2*24 =48 cm
BC=ME =6 cm
A mbtc =6*6 =36 cm^2
A mate =12*6 =72 cm^2
b) 72 cm ...........100%
36 cm ............x
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x=36*100/72 = 50 %
EMC +BAT =72-36 =36 cm^2
BAT =36:2 =18 cm ^2
36+18 =54 cm^2
72cm ..........100%
54cm ..........X
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X =54*100/72 =75%
Explicație pas cu pas:
