Question

Plz answer my question guys..​

Answer 1

Answer:

11. A)30cm

12. C)5

Step-by-step explanation:

I hope this is your answer

Answer 2

Answer:

11 (a) 30

Step-by-step explanation:

let the three sides of a triangle be a, b and c respectively

let the three sides of a triangle be a, b and c respectivelyperimeter = a + b + c

let the three sides of a triangle be a, b and c respectivelyperimeter = a + b + c100=30+40+c

let the three sides of a triangle be a, b and c respectivelyperimeter = a + b + c100=30+40+c100=70+c

let the three sides of a triangle be a, b and c respectivelyperimeter = a + b + c100=30+40+c100=70+c100-70=c

let the three sides of a triangle be a, b and c respectivelyperimeter = a + b + c100=30+40+c100=70+c100-70=c30=c

let the three sides of a triangle be a, b and c respectivelyperimeter = a + b + c100=30+40+c100=70+c100-70=c30=cor

let the three sides of a triangle be a, b and c respectivelyperimeter = a + b + c100=30+40+c100=70+c100-70=c30=corc=30