Question

1a) What is the side length of the following square? *

Answer 1

4 unit cubes

Explanation:

Answer 2

Exact: 2sqrt(5)

Approximate: 4.472

Explanation:

The side of the square is the hypotenuse of a right triangle with legs of lengths 2 and 4.

c^2 = a^2 + b^2

c^2 = 2^2 + 4^2

c^2 = 4 + 16

c^2 = 20

c = sqrt(20)

c = sqrt(4 * 5)

c = 2sqrt(5) = 4.472