Respostas

  • Usuário do Brainly
2014-05-31T12:12:54-03:00

pitagoras     hipotenusa=10     

                     catetos= x-2 e x

100=(x-2)² + x²

100=x²-4x+4+x²                          

2x²-4x-96=0  (:2)

x²-2x-48=0                                                       hip(h)=c.c

Δ=4+192=196    √196=14                                  10h=6.8

x=(2+14)/2                                                           10h=48

x=16/2=8                                                                  h=4,8


cateto=x-2=8-2=6                                   A= b.h/2

cateto=8                                                  A=(10 .4,8)/2

                                                                 A=48/2

P= 10+8+6=24                                            A=24


  

7 4 7
A resposta e isso tudim?
sim´1° achamos as medidas, depois calculamos a área e o perímetro
Ta ..