Final answer:
The height of the sail, given an area of 126 ft2 and a base of 12 ft, is 21 ft. This was calculated by using the formula for the area of a triangle, rearranging it to solve for the height, and then applying the given values.
Step-by-step explanation:
To find the height of the sail, we can rearrange the formula for the area of a triangle which is Area = 1/2 × base × height. With an area of 126 ft2 and a base of 12 ft, we can solve for the height.
The equation with the given values is: 126 = 1/2 × 12 × height. To find the height, we first multiply 2 by 126 to undo the division by 2, which gives us 252. Then we divide that by the base, which is 12, to get the height. Thus, the height is 252 divided by 12, which is 21 ft.