Обозначим основание за х см, то боковые стороны = х+2
составляем ур-е:
х+х+2+х+2=34
3х+4=30
х=10
основание = 10, боковые стороны = 12
After dinner, I helped my mother clean up. First I wiped the table. Then she washed it, wiped it, and put the dishes in their place. She removed all the remaining food in the refrigerator. Mom thanked me for the help.
Во второй задаче надо найти угол ВСМ. Нет никакого ВСD