Question

vreau si eu putin ajutor​

Answer 1

Răspuns:

Explicație pas cu pas:

construim CE⊥AB⇒

AE=CD =8 cm  si BE =4 cm

ΔCEB = drept.

CE²=CB²-BE²=8²-4²=64-16=48

CE=√48 =4√3 cm

b)

CD║AB⇒MC/MB=CD/AB

MC/MC+8 =8/12

12MC=8(MC+8)

12MC=8MC+64

12MC-8MC=64

4MC=64

MC=64/4 =16 cm

MB=MC+CB=16+8=24 cm

AM²=MB²-AB²=24²-12²=576-144=432

AM=√432 =12√3 cm

Aamb =AM*AB/2 =12√3*12/2 =72√3 cm²