Răspunsuri

2014-05-13T19:22:51+03:00
Aria trapezului=(baza mica+ baza mare)*h supra 2
A=(b+15)*8 pe 2
(b+15)*8 pe 2 =88
=> (b+15)*8=88*2
=>b+15=176/8
=>b+15=22
=>b=22-15
=>b=7
3 3 3
2014-05-13T19:27:47+03:00
A=[(B+b)·h]/2
88=[(15+b)·8]/2
88=(15+b)·4
88=60 +4b
4b=28
b=7 cm