Question

Urgent ,va rog frumos!!​

Answer 1

Răspuns:

Explicație pas cu pas:

ΔANM= drept.

AN=AD/2 =8/2 =4 cm

∡A =60° ⇒∡AMN=30° ⇒AM=2AN=2*4 =8 cm

∡B=120°  (∡A=60°⇒∡B=120°)

ΔMBC =isoscel (∡B=120°  ; ∡BCM=60:2 =30°⇒∡BMC =30°)

⇒MB=BC=AD =8 cm

AB =AM+MB=8+8 =16 cm

P=8+16+8+16 =48 cm

b)

notam MP⊥BP

ΔMPB= drept.

punctele C,B,P  coliniare

∡MBC=120° ⇒∡PBM =60°

sin60 =C.op/ip

√3/2 =MP/MB

√3/2 =MP/8

MP=8√3/2 =4√3 cm