Question

Doar 1 si 2 va rog rapid

Answer 1

1)
a) Aria▲=(cateta1×cateta2)/2=(5×?)/2 (nu se intelege ce scrie)
b)A=(4×5,5)/2=11,0 (cm^2)
c)A=(4×3)/2=6 (cm^2)
2)
0,5dm=50cm
a) A=(50×3)/2=75(cm^2)
b)30cm=3dm
6 dm^2=3dm× ...dm
6dm^2=3dm× 2dm
c)1,5dam=15 m
...m×15m=30 m^2
2m×15m=30m^2
d) 1 cm=10mm
0,42cm^2=42mm^2
10mm×.....mm=42mm^2
10mm×4,2mm=42mm^2
e)0,9 hm=90m
....m×90m=9990m^2
111m×90m=9990m^2