The area is 15*20 = 300 square feet.
length of diagonal of 20 of a 20 feet and 15 width.
Easy to do. Just multiply the two dimensions: 15 x 20 = 300 square feet.
15 x 20 = 300 square feet.
300 square feet
15 * 20 = 300 square feet.
The area is 15*20 = 300 square feet.
length of diagonal of 20 of a 20 feet and 15 width.
Area: 20 times 15 = 300 square feet
Easy to do. Just multiply the two dimensions: 15 x 20 = 300 square feet.
15 x 20 = 300 square feet.
It means the average person can see clearly at 20 feet what you can see clearly at 15 feet.
300 square feet
I'm not an opthamologist, but I believe that 15/15 is no better nor worse than 20/20.15/15 means that at 15 feet distance from the chart, you see what the average person would see at 15 feet distance.20/20 means that at 20 feet distance from the chart, you see what the average person would see at 20 feet distance.Since some people have problems with distance vision (Myopia), and some people have problems with near vision (Hyperopia), it would seem possible for someone to have 15/15, but not 20/20, or vice versa.
height = 15 ft base = 20 ft angle of elevation = arctan (15/20) = 36.87 degrees
Perimeter = 20+15+20+15 = 70 feet
300 square feet 300 ft²