Question

a triangle has sides 10,14 and 24 is the area of the triangle 0 because s is 24 and 24-24 is 0

Answer 1

No because the area of any figure can never be zero as area is the space covered by a figure. And this is not a triangle at all as 10+14 is not greater than 24 and in a triangle, the sum of any two sides should be more than the second.

Answer 2

first, the area can never be zero.
area is the space covered by the figure(here, the triangle) and bounded by its perimeter.
second, such a triangle does not exist.
because for any triangle to exist, the sum of any 2 sides should be greater than the third side. remember this property.
if you still have doubts, ask :)