Question

Bună! Mă poate ajuta cineva?​

Answer 1

C(O,50cm)

AB_l_CD ;OE_l_AB ;OE=14cm

OF _l_CD ;OF=30cm

a)pentru AB folosim ∆AEO dr.t.p.

AE=√50²-14²=48cm=>

AB=48×2=96cm

pt CD ∆OFD dr. FD=√50²-30²=40cm

CD=2×49=80cm

b)ACBD patrulater

P= ? nu știu

aria =aria ∆ACD+aria ∆CBD=

CD×AM/2+CD×MB/2=CD/2(AM++MB)=

CD×AB/2=80×96cm²=7680cm²