Perimeter: 9+10+9+10 = 38 feet
It is 5 feet because 2*(10+5) = 30 feet which is the perimeter
Perimeter = 4+4+10+10 = 28 feet
435,600 square feet in an acre. It depends on the shape of the acre to how many perimeter feet there are.
Perimeter = 2+3+2+3 10 feet
The perimeter of 10 acres is 8 feet since there are 4 square feet of area and 2 feet by 2 feet square.
10 square feet
15 feet
The length is 3 feet
10 x 4 sides = 40 feet
It depends on the shape. Let's say your lawn is 1 foot by 100 feet, which equals 100 square feet, then the surrounding measurement, called the 'perimeter', is 1+ 1+ 100+ 100 = 202 feet. Or, if the lawn is, say, 4 feet by 25 feet, which equals 100 square feet, the perimeter is 4+ 4+ 25+ 25 = 58 feet. If the lawn is perfectly square, its size would be 10 feet by 10 feet, and the perimeter is 10+ 10+ 10+ 10+ = 40 feet. The same is true for all dimensions in between: the perimeter changes as the shape of the lawn changes.
The diagonal is 10 feet. The one side is 8 feet and the other side is 6 feet (by Pythagoras 82 + 62 = 102)). The perimeter is thus 28 feet.