высоты параллелограмма равны 3см и 7см а периметр равен 42см найдите площадь параллелограмма 

1lena stayed in bed in the morning because....

a)she didn"t want to get up early

b)she didn"t feel well

c)she didn"t have to go to school

2 lena"s mother decided to bring her lemon tea becouse....

a) lena had summer holidays

b)lena had a lot to do

c)lena had a sore throat

please

помогите пожалуйста очень надо

заранее спасибо