Question

Ajutorrrrr va roggg !!! Exercitiul 1 ( a, c, g)

Answer 1

a) AC= AB+BC= 8cm+4cm=12cm

MN= (1/2×AB)+(1/2×BC)= 4cm+2cm=6cm

c) AC= 3,5cm+ 4,2cm= 7,7 cm

MN= 1,75 cm+ 2,1 cm= 3,85 cm

g) AB= AM×2= 8cm

BC= 18cm-8 cm= 10cm

MN= (AB/2)+(BC/2)= 4cm+ 5cm= 9cm

Answer 2

Răspuns:

Explicație pas cu pas:

a)

AB = 8 cm

BC = 4 cm

A__ __ __ __M__ __ __ __B__ __N__ __C

AC = AB + BC = 8 + 4 = 12 cm

MN = MB + BN = (8 : 2) + (4 : 2) = 4 + 2 = 6 cm

c)

AB = 3,5 cm

BC = 4,2 cm

AC = AB + BC = 3,5 + 4,2 = 7,7 cm

MN = MB + BN = (3,5 : 2) + (4,2 : 2) = 1,75 + 2,1 = 3,85 cm

g)

AC = 18 cm

AM = 4 cm

A__ __ __ __M__ __ __ __B__ __ __ __ __N__ __ __ __ __C

AB = 2 x AM = 2 x 4 = 8 cm

BC = AC - AB = 18 - 8 = 10 cm

BN = BC : 2 = 10 : 2 = 5 cm

MB = AM = 4 cm

MN = MB + BN = 4 + 5 = 9 cm