Question

Please answer me in copy please 11 and 12 please please send me in copy please ​

Answer 1

Answer:

hello good question!

Step-by-step explanation:

let the sides be 13x, 14x and 15x.

perimeter=84 cm.

hence, 13x+14x+15x=84

42x=84

x=84/42=2

hence, the sides are 26, 28 and 30.

use heron's formula

s= a+b+c/2= perimeter/2= 42

area= sqrt(s(s-a)(s-b)(s-c))

= sqrt (42*(42-26)(42-28)(42-30)

= sqrt(42*16*14*12)

prime factorise and find the answer

hope it helps!

Answer 2

Hi,friend answer of 11.is 336cm.And sorry dear i don't know the answer of question no.12..

Hope it helps you a lot.And sorry dear i can't answer your another question..

GOOD NIGHT.

HAVE A NICE DREAM.