Question

Ajutor :(( as dorii ajutor dca ase poate ​

Answer 1

Raspuns :

ex 14 ) Aria trapezului = (B+b) ×h/2

= (15cm +72)×4cm/2

=87cm × 4cm / 2

=348 cm /2 = 172 cm

unde : B- baza mare

b-baza mica [ 7,2dm×10=72]

h-inaltimea

ex 15 )

Aria unui trapez dreptunghic : ( B+ b) ×h /2

= (14 cm + 26 cm ) ×8 cm /2

= 40 cm ×8 /2

=320 cm/2

=160 cm