Question

Vă rog punctele d) e )​

Answer 1

Explicație pas cu pas:

d )

• [MB] = 2 cm , M = mijl segm [AB] => [AM] = [MB] => [AM] = 2 cm => [AB] = [AM] + [MB] = 2 cm × 2 = 4 cm

• N = mijl segm [BC] , [BC] = 7 cm => [BN] = [NC] => [BN] = 7 cm : 2 = 3,5 cm => [NC] = 3,5 cm

• [MN] = [MB] + [BN] => [MN] = 2 cm + 3,5 cm = 5,5 cm

e )

• N = mijl segm [BC] , [NC] = 3,5 cm => [BN] = [NC] => [BN] = 3,5 cm => [BC] = [BN] + [NC] = 3,5 cm + 3,5 cm = 7 cm

• [MB] = [MN] - [BN] = 8 cm - 3,5 cm = 4,5 cm

• M = mijl segm [AB] , [MB] = 4,5 cm => [AM] = [MB] => [AM] = 4,5 cm => [AB] = [AM] + [MB] = 4,5 cm + 4,5 cm = 9 cm

• [BA] = [AB] => [BA] = 9 cm