Ill give brainliest if you find the hypotenuse of a right triangle with legs measuring 4 and 5 ft. 6.40 answer a=4, b=5, so 42 + 52 = c2 and 16 + 25 = c2, so 41 = c2, then the square root of 41 =c can someone explain how to get this? ?

Scenario: susan wants to make 2 square flags to sell at a crafts fair. the fabric she wants to buy is 3 meters wide. she doesn't want any fabric left over. what's the least amount of fabric she should buy? question: which equation will susan solve her problem? note: let x represent the length of 1 side of the flag. options: 1) 2x^2 = 4x 2) 8 +2x = 2(4x) 3) 2 * 2 = 4 * 2 4) 4x^2 -2x = 0