Question

Fie un paralelogram la care se cunosc ab =10, ad=8cm si m (

Answer 1

Aria=AB*AD*sin A
2m(A)=360- 2m(D) rezulta ca 2m(A)=360-2*30⇒m(A)=150 grade
Aria=10*8*sin 150
sin 150=1/2 ⇒Aria=10*8*1/2=40 cm²
Aria calculata altfel=AB*DE.( fie de distanta de la a la DC)
⇒40=10*DE⇒DE=40/10=4 cm