Respuesta :

Answer:

38 cm.

Step-by-step explanation:

Two sides are equal ( as its an isosceles triangle). so:

3x - 5 = 19 - x

3x + x = 19 + 5

4x = 24

x = 6.

So the perimeter

=  3x - 5 + 19 - x + 2x

= 3(6) - 5 + 19 - 6 + 2(6)

= 18 - 5 + 19 - 6 + 12

= 49 - 11

= 38 cm.

Otras preguntas