1.

The perimeter of a triangle field is 450m it's side's are in the ratio 13:12:15.using herons formula find the area of triangle.

Answer»

Hi
Let 1st side be 13x.
2nd side 12x.
3rd side 15X
Perimeter =450m
SEMI perimeter = a+b+c \2
SO,
Semi perimeter = 13x+12x+15x \2
= 40\2
=20....

By herons formula...........

√s(s-a) (s-b) (s-c)
20 (20-13)(20-12)(20-15)
20 ×7 × 6×5
4200 APP. Hope it HELP you



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