Question

Problema 1a. Va rog!​

Answer 1

Explicație pas cu pas:

CE²=AE*EB

CE²=AE(AB-AE)

CE²=AE*AB-AE²

144=AE*25-AE²

AE²-25AE+144=0

Δ=49

AE1=16(cm)

AE2=EB=9(cm)

A=(DC+AB)*CE/2=(16+25)*12/2=41*6=246(cm²);

AB/AE-EB/DC=DC/(AB-EB)

25/16-9/16=16/(25-9)

(25-9)/16=16/16

16/16=16/16

1=1 Adevarat.

Bafta!