Question

12. Find the percentage decrease in the area of a triangle if each of its sides is halved.
Decrease in area
[Hint : Percentage decrease in area =
x100]
Original area​

Answer 1

Answer:

Area of traingle=A=root of [s(s-a)

(s-b)(s-c) where 2s=a+b+c.

Each side is halved,

(s'-a')=(s-a)/2

(s'-b')=(s-b)/2

(s'-c')=(s-c)/2

New area A'=square root of

Step-by-step explanation:

[s(s-a)(s-b)(s-c)/16.=A/4.

change in area =3/4A=75% decrease