Question

What is the area of a triangle with sides of length 4, 6, and 9?

Answer 1

here
side of triangle is 4,6and 9
S=A+B+C/2=4+6+9/2=19/2=9.5

by heroine formula
area of triangle
=underoot S(S-A)(S-B)(S-C)
=underoot 9.5(9.5-4)(9.5-6)(9.5-9)
=underoot 9.5×5.5×3.5×0.5
=underoot 91.4375
=9.56