So lets start by substituting these numbers into the equation for the area of a triangle. A=1/2bh. So 245=1/2*14*h. Now you just have to solve it like a simple algebraic equation. Start by taking 14*1/2. So now we have 245=7h. Now divide by 7. 245/7 is 35. 1/2*14*35=245. So the height is 35 inches.
