Respuestas

2012-08-05T19:20:26+02:00

a=2h

2a+2h=30

 

2*2h+2h=30

4h+2h=30

6h=30

h=5 cm

 

a=2*5

a=10 cm

2012-08-05T19:29:38+02:00

base= 2x

altura= x

 

base * altura = 30

x + 2x = 30

3x=30

x=30/3

x=10

 

base= 20

altura= 10