Question

Imi trebuieste acum urgent!Dau coroana!

Answer 1

AB=CD=x-7=25,4-7=18,4, MD=CD/2=18,4/2=9,2=Rcerc, Dcerc=9,2*2=18,4cm
calculam lungimea arcului de cerc=$\pi$R=9,2$\pi$in acest caz
P=AB+BC+CD+(AD-Dcerc)+larcului=18,4+25,4+18,4+7+9,2$\pi$P=69,2+9,2$\pi$  ($\pi$=3.14)
Afigurii=Adreptunghi-Asemicerc, Ad=Lxl=25,4x18,4=467,36, As=$\pi$$R^{2}$/2=84.64$\pi$,  Af=467,36+84,64$\pi$