Question

Find the length of a rectangle with perimeter 20.2 and width 7.8. Please show work.

Answer 1

17.94

Explanation:

The formula for a problem like this is

P W/2 -W^2

Multiply the perimeter by half of the width and then subtract the width squared.

7.8/2 This would give us 3.9

Then we multiply this by the perimeter

3.9x20.2 This leads us too 78.78

Then we subtract w^2

7.8X7.8 Is equal too 60.84

Then we subtract

78.78-60.84 This leads us too 17.94