3 because the formula of a triangle is A=1/2b x h so 5 times 6 equals 30 But wait 1/2 is in the equation meaning that it is 3
The area of a triangle is 1/2 base times height. Your area is 30 so divide it by the given height of 5. You get 6. Then just divide that by 2 and your answer is 3 ft.
