Question

$ajutati - ma \: repede \: va \: rog$
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Answer 1

Răspuns:

A=[(B+b)·h]/2

b=12cm

B=2,4dm=24cm

h=8cm

A=[(24+12)·8]/2=(36·8)/2=144 cm²

B=baza mare,b=baza mica,h=inaltimea

______________

h=2,4dm=240mm

B+b=560mm

A=[(B+b)·h]/2

A=560·240:2

A=67200mm²

Answer 2

Răspuns:

26 )Aria trapezului = (B+b)×h/2

b=12cm

B=24 cm( am schimbat din dm in cm )

h=8cm

A=(24+12)×8/2=36×4=144 cm patrati

27) Aria trapezului = (B+b)×h/2

B+b=56cm(am schimbat din mm in cm)

h=24cm(am schimbat din dm in cm)

A =56×24/2=672 cm patrati