Question

Sides of a triangle are 39 cm,25cm,56cm Find it's area​

Answer 1

Answer:

given : sides of triangle are = 25cm , 39 cm, 56cm

find: are of triangle= ?

now : a= 25cm, b=39cm, c= 56cm

s= a+b+c/2 = 25+39+56/2

120/2=60

area= √s(s-a) (s-b) (s-c)

√60(60-25) (60-39) (60-56)

√60×35×21×4

√5×2×6×5×7×7×3×4

420 cm^(2)

area =420cm^(2)